{"id":332,"date":"2026-03-23T20:11:33","date_gmt":"2026-03-23T20:11:33","guid":{"rendered":"https:\/\/www.trackreadyproducts.com\/garage\/?p=332"},"modified":"2026-07-08T23:05:07","modified_gmt":"2026-07-08T23:05:07","slug":"kn-cold-air-intakes-what-they-do-how-they-work-and-why-track-drivers-use-them","status":"publish","type":"post","link":"https:\/\/www.trackreadyproducts.com\/garage\/kn-cold-air-intakes-what-they-do-how-they-work-and-why-track-drivers-use-them\/","title":{"rendered":"K&amp;N Cold Air Intakes: What They Do, How They Work, and Why Track Drivers Use Them"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"332\" class=\"elementor elementor-332\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f762c45 e-flex e-con-boxed e-con e-parent\" data-id=\"f762c45\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-df4fb77 elementor-widget elementor-widget-html\" data-id=\"df4fb77\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<style>\n  \/* \u2500\u2500 RESET & BASE \u2500\u2500 *\/\n  .kn-post *, .kn-post *::before, .kn-post *::after {\n    box-sizing: border-box;\n    margin: 0;\n    padding: 0;\n  }\n\n  .kn-post {\n    --red: #e02020;\n    --black: #111111;\n    --dark: #1a1a1a;\n    --mid: #2a2a2a;\n    --border: #e0e0e0;\n    --border-dark: #333;\n    --text: #222222;\n    --muted: #666666;\n    --white: #ffffff;\n    --bg: #ffffff;\n    --callout-bg: #f5f5f5;\n  }\n\n  \/* \u2500\u2500 TOPBAR \u2500\u2500 *\/\n  .kn-post .topbar {\n    background: #f0f0f0;\n    border-bottom: 1px solid #e0e0e0;\n    padding: 14px 24px;\n    display: flex;\n    align-items: center;\n    gap: 16px;\n    font-family: 'Barlow Condensed', sans-serif;\n    font-size: 13px;\n    letter-spacing: .06em;\n    text-transform: uppercase;\n    color: var(--muted);\n  }\n  .kn-post .topbar a { color: var(--muted); 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color: var(--white); }\n\n  \/* \u2500\u2500 SIDEBAR \u2500\u2500 *\/\n  .kn-post .sidebar { padding-top: 48px; }\n  .kn-post .sidebar-sticky { position: sticky; top: 24px; }\n  .kn-post .sidebar-widget {\n    background: var(--dark);\n    border: 1px solid var(--border-dark);\n    margin-bottom: 16px;\n  }\n  .kn-post .widget-head {\n    background: var(--mid);\n    padding: 12px 16px;\n    font-family: 'Barlow Condensed', sans-serif;\n    font-size: 11px;\n    font-weight: 700;\n    letter-spacing: .12em;\n    text-transform: uppercase;\n    color: #888;\n    border-bottom: 1px solid var(--border-dark);\n  }\n  .kn-post .widget-body { padding: 16px; }\n  .kn-post .back-link {\n    display: flex;\n    align-items: center;\n    gap: 10px;\n    color: var(--red);\n    text-decoration: none;\n    font-family: 'Barlow Condensed', sans-serif;\n    font-size: 14px;\n    font-weight: 700;\n    letter-spacing: .06em;\n    text-transform: uppercase;\n    transition: gap .2s;\n  }\n  .kn-post .back-link:hover { gap: 14px; }\n  .kn-post .back-link::before { content: '\u2190'; font-size: 16px; }\n  .kn-post .sidebar-cta-btn {\n    display: block;\n    background: var(--red);\n    color: var(--white);\n    text-align: center;\n    text-decoration: none;\n    font-family: 'Barlow Condensed', sans-serif;\n    font-size: 14px;\n    font-weight: 700;\n    letter-spacing: .1em;\n    text-transform: uppercase;\n    padding: 14px 16px;\n    transition: background .2s;\n    margin-bottom: 16px;\n  }\n  .kn-post .sidebar-cta-btn:hover { background: #b81818; }\n  .kn-post .toc-list { list-style: none; margin: 0; padding: 0; }\n  .kn-post .toc-list li { border-bottom: 1px solid var(--border-dark); }\n  .kn-post .toc-list li:last-child { border-bottom: none; }\n  .kn-post .toc-list a {\n    display: block;\n    padding: 10px 16px;\n    font-size: 13px;\n    color: #888;\n    text-decoration: none;\n    transition: color .2s, background .2s;\n    line-height: 1.3;\n  }\n  .kn-post .toc-list a:hover { color: var(--white); background: var(--mid); }\n\n  .kn-post hr.section-rule {\n    border: none;\n    border-top: 1px solid var(--border);\n    margin: 40px 0;\n  }\n\n  \/* \u2500\u2500 RESPONSIVE \u2500\u2500 *\/\n  @media (max-width: 768px) {\n    .kn-post .page-wrap { grid-template-columns: 1fr; }\n    .kn-post .sidebar { display: none; }\n    .kn-post .post-header { padding: 40px 24px 32px; }\n  }\n<\/style>\n\n<div class=\"kn-post\">\n\n  <!-- Body -->\n  <div class=\"page-wrap\">\n\n    <article class=\"post-body\">\n\n      <p>K&amp;N Engineering has been building air filtration and intake systems since 1969 \u2014 starting in racing, long before the performance aftermarket was what it is today. More than five decades later, K&amp;N cold air intakes are still one of the most popular and well-understood bolt-on modifications available for virtually any street car, performance vehicle, or track build.<\/p>\n\n      <p>If you're looking at a K&amp;N cold air intake and trying to cut through the marketing, this is the guide for you. We'll break down exactly how these systems work, what kind of gains are realistic, where they shine on track, and what to think about when picking one for your application.<\/p>\n\n      <div class=\"callout\">\n        <p><strong>Shop K&amp;N Engineering at Track Ready Products:<\/strong> We carry a full selection of K&amp;N cold air intakes and high-flow filters. <a href=\"https:\/\/www.trackreadyproducts.com\/kn-engineering-m-42.html\">Browse K&amp;N products \u2192<\/a><\/p>\n      <\/div>\n\n      <h2 id=\"what-is-cold-air-intake\">What Is a Cold Air Intake \u2014 and What Makes It \"Cold\"?<\/h2>\n\n      <p>The term \"cold air intake\" refers to an intake system designed to pull cooler, denser air into the engine compared to what a factory airbox delivers. Cold air is more oxygen-rich than warm air \u2014 meaning your engine gets more of the molecule it needs for combustion with every intake stroke.<\/p>\n\n      <p>A factory airbox is designed with a lot of compromises in mind: noise suppression, emissions compliance, packaging constraints, and cost. The result is an intake path that often pulls warm underhood air through a thick paper filter and into a convoluted set of plastic tubing. That's not an ideal setup for power.<\/p>\n\n      <p>K&amp;N cold air intakes address this with a combination of two things:<\/p>\n      <ul>\n        <li><strong>A high-flow air filter<\/strong> that allows significantly more airflow than a standard paper element \u2014 K&amp;N's oiled cotton gauze design flows up to 50% more air than a typical disposable filter.<\/li>\n        <li><strong>Aerodynamically engineered intake tubing<\/strong> that smooths out airflow, eliminates unnecessary bends, and positions the filter in a cooler location \u2014 often lower in the engine bay or near a fender opening where it can pull in ambient air rather than hot air off the engine block.<\/li>\n      <\/ul>\n\n      <p>The result is an intake path that's less restrictive and feeds cooler, denser air to the throttle body. Both factors contribute to better combustion efficiency and measurable power gains.<\/p>\n\n      <div class=\"stat-grid\">\n        <div class=\"stat-block\">\n          <span class=\"num\">50%<\/span>\n          <span class=\"label\">More airflow vs. paper filter<\/span>\n        <\/div>\n        <div class=\"stat-block\">\n          <span class=\"num\">~1hr<\/span>\n          <span class=\"label\">Typical installation time<\/span>\n        <\/div>\n        <div class=\"stat-block\">\n          <span class=\"num\">100K<\/span>\n          <span class=\"label\">Miles between cleanings (street use)<\/span>\n        <\/div>\n        <div class=\"stat-block\">\n          <span class=\"num\">10yr<\/span>\n          <span class=\"label\">Warranty \/ Million Mile<\/span>\n        <\/div>\n      <\/div>\n\n      <h2 id=\"how-kn-filters-work\">How K&amp;N's Filter Technology Works<\/h2>\n\n      <p>K&amp;N's signature filter design uses multiple layers of pleated, oiled cotton gauze sandwiched between two layers of wire mesh. The oiled cotton is the key \u2014 it traps particles on contact as air flows through, rather than relying on a dense paper matrix that air has to force its way through.<\/p>\n\n      <p>This means a K&amp;N filter can use a relatively open, breathable media while still offering genuine engine protection. The oil acts as a tackifier, grabbing dust and debris before it can pass through. As the filter loads up with trapped particles, it actually becomes marginally more efficient at filtration \u2014 though it does eventually need to be cleaned and re-oiled to maintain peak airflow.<\/p>\n\n      <p>For track and HPDE use, this is a practical advantage. One K&amp;N filter, cleaned periodically, replaces the ongoing cost and waste of disposable paper elements. For drivers running regular track days, that adds up.<\/p>\n\n      <div class=\"callout\">\n        <p><strong>Note on oiled filters and MAF sensors:<\/strong> K&amp;N oiled filters have occasionally been linked to MAF sensor contamination if over-oiled during servicing. Follow K&amp;N's recharge kit instructions carefully \u2014 use the correct amount of oil, let it fully absorb before installation, and never over-saturate the media. If you prefer to avoid this entirely, K&amp;N also offers <strong>DryFlow<\/strong> intake systems that use an oil-free synthetic filter media.<\/p>\n      <\/div>\n\n      <h2 id=\"performance-gains\">Realistic Performance Expectations<\/h2>\n\n      <p>K&amp;N stands behind their horsepower and torque claims with real dyno testing \u2014 every intake system ships with a dyno report. What those numbers look like in practice varies depending on your vehicle, its existing tune, and what else has been done to the car.<\/p>\n\n      <p>Here's how to think about the gains:<\/p>\n\n      <h3>Wide-Open Throttle Is Where It Matters Most<\/h3>\n      <p>Intake restriction has the biggest impact at wide-open throttle when the engine is demanding maximum airflow. That's exactly when you're pushing hardest on a track lap \u2014 not cruising at steady state. If you're doing HPDE, autocross, Lucky Dog, or any competitive event, the gains are most relevant at precisely the moments you need them.<\/p>\n\n      <h3>Throttle Response and Engine Character<\/h3>\n      <p>Many drivers report improved throttle response as the most noticeable day-to-day improvement after installing a K&amp;N cold air intake. A less restrictive intake path means the engine reacts more crisply to pedal input. You'll also hear more induction sound under hard acceleration \u2014 a mechanical intake growl that quiets back down at cruise speed once the factory baffles and noise-dampening components are removed from the system.<\/p>\n\n      <h3>Heat Soak Reduction<\/h3>\n      <p>On track, where the engine bay temperature builds significantly over a session, the positioning of a cold air intake filter matters. A system that relocates the filter away from heat-soaked underhood air \u2014 pulling from a cooler airstream \u2014 will maintain more consistent inlet air temperature across a long stint than a stock airbox getting cooked between sessions.<\/p>\n\n      <h3>The Tune Question<\/h3>\n      <p>Most K&amp;N cold air intakes are engineered to work with a factory tune and stay within OEM fuel trim parameters. You should not need a tune to install one on a stock engine. However, if you're building toward a more heavily modified setup \u2014 forced induction, significant cam work, exhaust upgrades \u2014 pairing the intake with a proper tune from a company like Cobb, HPTuners, or a similar calibration tool will extract the full benefit of every component working together.<\/p>\n\n      <h2 id=\"intake-types\">K&amp;N Intake System Types<\/h2>\n\n      <p>K&amp;N offers several intake configurations, and it's worth understanding what differentiates them before picking a system.<\/p>\n\n      <table class=\"compare-table\">\n        <thead>\n          <tr>\n            <th>System Type<\/th>\n            <th>Description<\/th>\n            <th>Best For<\/th>\n          <\/tr>\n        <\/thead>\n        <tbody>\n          <tr>\n            <td><strong>Cold Air Intake (CAI)<\/strong><\/td>\n            <td>Full system with extended tube routing the filter away from engine heat \u2014 often into the fender or lower in the bay<\/td>\n            <td class=\"good\">Track, performance builds, heat soak concerns<\/td>\n          <\/tr>\n          <tr>\n            <td><strong>Short Ram Intake (SRI)<\/strong><\/td>\n            <td>Shorter intake tube, filter stays in the engine bay \u2014 less tubing complexity, easier install<\/td>\n            <td class=\"neutral\">Daily drivers, budget upgrades, simpler installs<\/td>\n          <\/tr>\n          <tr>\n            <td><strong>AirCharger (57\/63 Series)<\/strong><\/td>\n            <td>Polyethylene tube systems \u2014 aerodynamic single-tube design replacing the full factory airbox and plumbing<\/td>\n            <td class=\"good\">Broad vehicle compatibility, excellent airflow<\/td>\n          <\/tr>\n          <tr>\n            <td><strong>Typhoon (69 Series)<\/strong><\/td>\n            <td>Polished aluminum tube \u2014 high-flow design for performance-focused builds, clean engine bay appearance<\/td>\n            <td class=\"good\">Show builds, enthusiast use, street performance<\/td>\n          <\/tr>\n          <tr>\n            <td><strong>DryFlow Intake<\/strong><\/td>\n            <td>Oil-free synthetic filter media \u2014 no re-oiling required, eliminates any MAF oil concerns<\/td>\n            <td class=\"neutral\">Precision sensor environments, driver preference<\/td>\n          <\/tr>\n        <\/tbody>\n      <\/table>\n\n      <h2 id=\"track-use\">K&amp;N Cold Air Intakes for Track and HPDE Use<\/h2>\n\n      <p>If you're running HPDE, Lucky Dog, SCCA, or just using your car on track regularly, the K&amp;N cold air intake is a sensible early upgrade for a few specific reasons.<\/p>\n\n      <h3>Reduced Restriction at Full Throttle<\/h3>\n      <p>On track you're on throttle hard and often. A stock airbox with a paper element creates measurable restriction at the intake \u2014 pressure drop across a restrictive filter at wide-open throttle translates directly to lost power. Even a modest improvement in airflow efficiency at peak demand is felt in corner exit acceleration and top-end pull.<\/p>\n\n      <h3>Reusable Filter for Regular Use<\/h3>\n      <p>Track drivers go through filter media faster than street drivers. Dusty pit environments, tire debris on track, and the general abuse of a hot lap are rough on disposable filters. A K&amp;N filter cleaned and re-oiled after each event stays at peak performance without ongoing filter replacement costs.<\/p>\n\n      <h3>Works With Factory Safety Regulations<\/h3>\n      <p>Most HPDE organizations don't have restrictions on intake modifications, and K&amp;N systems are smog-legal in most states (CARB-approved parts are available for California). For drivers running in classed competition, check your rulebook \u2014 class regulations can limit intake modifications in some series.<\/p>\n\n      <h3>Engine Sound<\/h3>\n      <p>This one's subjective, but worth mentioning: K&amp;N cold air intakes significantly change the intake soundtrack. That mechanical induction roar under hard acceleration is real and noticeable \u2014 a reminder that you're running a higher-flowing system than stock. At cruise speed it settles back to normal. On track, most drivers appreciate it.<\/p>\n\n      <div class=\"cta-block\">\n        <h3>Shop K&amp;N Engineering at Track Ready Products<\/h3>\n        <p>We carry K&amp;N cold air intakes, high-flow replacement filters, and intake accessories. Find the right system for your vehicle and get it out to the track.<\/p>\n        <a href=\"https:\/\/www.trackreadyproducts.com\/kn-engineering-m-42.html\">Browse K&amp;N Products \u2192<\/a>\n      <\/div>\n\n      <h2 id=\"drop-in-vs-full-intake\">Drop-In Filter vs. Full Cold Air Intake: Which Should You Buy?<\/h2>\n\n      <p>K&amp;N also sells drop-in replacement filters that fit directly into your factory airbox without any other modification. This is often the question: start with a K&amp;N drop-in, or go straight to a full cold air intake system?<\/p>\n\n      <p>Here's the honest answer: a K&amp;N drop-in filter is a low-effort, meaningful upgrade on its own. You're still limited by the factory airbox design and intake tubing, but you remove the paper filter restriction and gain the reusable filter benefits. If you're not ready to commit to a full intake system or have budget constraints, the drop-in is a solid starting point.<\/p>\n\n      <p>A full K&amp;N cold air intake system takes it further by addressing the entire intake path \u2014 not just the filter. You get the benefits of the high-flow filter plus the optimized tubing routing, better heat management, and the improved intake sound. For track-focused builds, the full system is worth the additional investment.<\/p>\n\n      <h2 id=\"installation\">Installation: What to Expect<\/h2>\n\n      <p>K&amp;N cold air intakes are designed with DIY installation in mind. Most systems install in under an hour using basic hand tools \u2014 typically 8mm and 10mm sockets, a screwdriver, and whatever's needed to access your specific vehicle's intake routing.<\/p>\n\n      <p>Every system includes detailed step-by-step instructions and all necessary hardware. The general process is:<\/p>\n      <ol>\n        <li>Remove the factory airbox, resonator, and intake tubing<\/li>\n        <li>Install the K&amp;N intake tube and any included brackets or adapters<\/li>\n        <li>Attach the high-flow filter to the end of the tube<\/li>\n        <li>Reconnect sensors (MAF, IAT) per the included instructions<\/li>\n        <li>Start the car and check for air leaks at all connections<\/li>\n      <\/ol>\n\n      <p>If you're working on a newer vehicle with a mass airflow sensor, take care when reconnecting that sensor and don't disturb the sealed section of intake tubing between the MAF and throttle body. Unmeasured air entering downstream of the MAF will cause a rich\/lean condition and trigger check engine codes.<\/p>\n\n      <h2 id=\"maintenance\">Maintaining a K&amp;N Cold Air Intake<\/h2>\n\n      <p>One of the selling points of a K&amp;N filter is that you clean and reuse it rather than replacing it. That said, maintenance does need to happen \u2014 a clogged or improperly maintained filter restricts airflow and undermines everything the intake is supposed to do.<\/p>\n\n      <h3>Cleaning Interval<\/h3>\n      <p>Under normal highway conditions, K&amp;N recommends inspecting the filter every 10,000 miles and cleaning it approximately every 100,000 miles. Track use in dusty environments shortens that significantly \u2014 inspect after each event and clean when the filter media appears dirty or airflow seems reduced.<\/p>\n\n      <h3>The Recharge Kit<\/h3>\n      <p>K&amp;N sells a recharge kit that includes filter cleaner and the correct red filter oil. The process is: apply cleaner, let it soak, rinse gently from the inside out, let the filter fully dry (do not use heat to speed this up), then apply the oil in a thin, even coat across the pleats. Wait 20 minutes for the oil to absorb before reinstalling. Over-oiling is the primary cause of MAF sensor issues \u2014 more oil is not better.<\/p>\n\n      <h2 id=\"kn-engineering\">About K&amp;N Engineering<\/h2>\n\n      <p>K&amp;N Engineering was founded in 1969 in Riverside, California. The company started by building high-flow oiled cotton filters for off-road racing vehicles, where stock paper elements couldn't survive the conditions. From that racing application, the product expanded into street performance, and K&amp;N became the brand that essentially created the reusable high-flow filter category.<\/p>\n\n      <p>Today, K&amp;N's product development and testing is centered at their world headquarters in Riverside, California. All air filter designs are tested in an ISO 5011-compliant test laboratory for both filtration efficiency and airflow performance. The intake systems are designed and engineered in-house and manufactured primarily at their facility in Grand Prairie, Texas.<\/p>\n\n      <p>For more than 50 years, K&amp;N has maintained a consistent position as the benchmark brand for high-flow filtration. Their product lineup covers thousands of vehicle applications \u2014 from commuter cars and trucks to dedicated track builds and off-road rigs.<\/p>\n\n      <h2 id=\"faq\">Frequently Asked Questions<\/h2>\n\n      <h3>How much horsepower does a K&amp;N cold air intake add?<\/h3>\n      <p>Power gains vary by vehicle and system. K&amp;N dyno-tests every intake system and includes the results with each kit. Gains are most pronounced at wide-open throttle \u2014 which is exactly where they matter most on track. Gains are modest on mildly built street cars, and more significant when combined with other supporting modifications and a proper tune.<\/p>\n\n      <h3>Do K&amp;N cold air intakes require a tune?<\/h3>\n      <p>Most K&amp;N systems are engineered to work within factory ECU parameters without a tune. On a stock or mildly modified engine, you can install and drive without any ECU changes. For heavily modified builds, a tune will maximize the benefit of the intake \u2014 and every other supporting modification.<\/p>\n\n      <h3>Are K&amp;N cold air intakes good for track use?<\/h3>\n      <p>Yes \u2014 particularly because the gains are most relevant at the throttle positions you're using on track, the reusable filter holds up to regular use without ongoing replacement cost, and the improved inlet air temperature management helps during long sessions where heat soak becomes a factor.<\/p>\n\n      <h3>How often does a K&amp;N filter need to be cleaned?<\/h3>\n      <p>K&amp;N recommends every 100,000 miles under normal highway driving. For track use in dusty conditions, inspect after each event and clean as needed. A dirty filter restricts airflow and defeats the purpose of the upgrade.<\/p>\n\n      <h3>What is K&amp;N's warranty?<\/h3>\n      <p>K&amp;N backs their intake systems with a 10-Year\/Million Mile Limited Warranty, and the High-Flow Air Filters carry a No-Hassle Lifetime Limited Warranty.<\/p>\n\n      <h3>Will a K&amp;N cold air intake void my vehicle warranty?<\/h3>\n      <p>Federal law (the Magnuson-Moss Warranty Act) prohibits manufacturers from voiding a warranty solely because an aftermarket part was installed. A manufacturer would need to demonstrate that the specific part caused a specific failure. K&amp;N cold air intakes are designed to work with factory tunes and systems \u2014 they do not modify ECU parameters or alter powertrain hardware beyond the intake system itself.<\/p>\n\n      <hr class=\"section-rule\">\n\n      <div class=\"cta-block\">\n        <h3>Ready to Upgrade Your Intake?<\/h3>\n        <p>Track Ready Products carries K&amp;N Engineering cold air intakes, replacement filters, recharge kits, and intake accessories. Find your vehicle, pick the right system, and get it to the track.<\/p>\n        <a href=\"https:\/\/www.trackreadyproducts.com\/kn-engineering-m-42.html\">Shop K&amp;N Engineering \u2192<\/a>\n      <\/div>\n\n    <\/article>\n\n    <!-- Sidebar -->\n    <aside class=\"sidebar\">\n      <div class=\"sidebar-sticky\">\n\n        <div class=\"sidebar-widget\">\n          <div class=\"widget-head\">Navigation<\/div>\n          <div class=\"widget-body\">\n            <a href=\"https:\/\/www.trackreadyproducts.com\/garage\/kn-engineering\/\" class=\"back-link\">K&amp;N Engineering Hub<\/a>\n          <\/div>\n        <\/div>\n\n        <a href=\"https:\/\/www.trackreadyproducts.com\/kn-engineering-m-42.html\" class=\"sidebar-cta-btn\">Shop K&amp;N Engineering \u2192<\/a>\n\n        <div class=\"sidebar-widget\">\n          <div class=\"widget-head\">In This Article<\/div>\n          <ul class=\"toc-list\">\n            <li><a href=\"#what-is-cold-air-intake\">What Is a Cold Air Intake?<\/a><\/li>\n            <li><a href=\"#how-kn-filters-work\">How K&amp;N Filter Tech Works<\/a><\/li>\n            <li><a href=\"#performance-gains\">Realistic Performance Gains<\/a><\/li>\n            <li><a href=\"#intake-types\">K&amp;N Intake System Types<\/a><\/li>\n            <li><a href=\"#track-use\">For Track &amp; HPDE Use<\/a><\/li>\n            <li><a href=\"#drop-in-vs-full-intake\">Drop-In vs. Full Intake<\/a><\/li>\n            <li><a href=\"#installation\">Installation Overview<\/a><\/li>\n            <li><a href=\"#maintenance\">Filter Maintenance<\/a><\/li>\n            <li><a href=\"#kn-engineering\">About K&amp;N Engineering<\/a><\/li>\n            <li><a href=\"#faq\">FAQ<\/a><\/li>\n          <\/ul>\n        <\/div>\n\n      <\/div>\n    <\/aside>\n\n  <\/div><!-- .page-wrap -->\n\n<\/div><!-- .kn-post -->\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>K&amp;N Engineering has been building air filtration and intake systems since 1969 \u2014 starting in racing, long before the performance aftermarket was what it is today. More than five decades later, K&amp;N cold air intakes are still one of the most popular and well-understood bolt-on modifications available for virtually any street car, performance vehicle, or [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[25],"tags":[],"class_list":["post-332","post","type-post","status-publish","format-standard","hentry","category-kn-engineering"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>K&amp;N Engineering | Cold Air Intakes, Air Filters &amp; Performance Filtration | Track Ready Products<\/title>\n<meta name=\"description\" content=\"K&amp;N Engineering has been building high-flow air intakes since 1969. 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