The K&N 77-2594KC is a 77 Series cold-air induction kit built around a mandrel-bent aluminum intake tube and a washable, oiled cotton-gauze filter. It is sized for the 2.3L EcoBoost four-cylinder in the Ford Explorer and takes the place of the factory filter housing and intake tube, so air reaches the throttle body through a shorter, smoother path. The aluminum tube has a gunmetal-gray powder-coat finish, and the filter is a red, oversized conical element.
Stock air boxes restrict airflow, and a cheap universal filter rarely fixes that. The manufacturer lists an estimated gain of about 10 horsepower at 4056 RPM for this kit, and its filter needs cleaning only about every 100,000 miles under normal highway driving, which means no recurring paper-filter purchases. The kit carries a limited lifetime warranty. The manufacturer's install sheet covers the 2020–24 Explorer with the 2.3L EcoBoost, although the product title reads 20-21, so confirm your model year before ordering. This kit is not legal for use on this vehicle in California.
Install is a hand-tool job, with the manufacturer's sheet pointing to roughly an hour, and owners on user forums often report 90 minutes once the duct tabs are considered. Disconnect the negative battery cable first, since that resets radio presets, then release the fresh-air duct, unclip the upper filter housing, and move the inlet air temperature sensor to the new tube. Keep the factory intake, and use only the hardware in the box, because the manufacturer warns that mismatched parts can damage the tube, throttle body, or engine. Searchers looking for a 2020 2021 Explorer 2.3 EcoBoost cold air intake, a no-drill CAI, or an oiled cotton gauze high-flow filter will find this kit a direct match.
The manufacturer's install instructions cover the 2020–24 Ford Explorer with the 2.3L L4 EcoBoost engine. The product title says 20-21, so confirm your exact model year with the manufacturer before ordering.
No. The manufacturer lists this kit as not legal for use on this vehicle in California.
The manufacturer recommends that customers do not discard the factory air intake, so store it in case you need to return the vehicle to stock.
The manufacturer states the filter only needs cleaning about every 100,000 miles under normal highway driving conditions. Harsher or dustier conditions will shorten that interval.
Difficulty is moderate and requires only basic hand tools. Per the manufacturer's instructions, disconnect the negative battery cable first, noting that this erases pre-programmed electronic memories, and then remove the fresh-air duct by releasing its two tabs at the core support, which can be hard to see; removing the charge tube gives better access. Next, loosen the hose clamp at the air filter housing, disconnect the inlet air temperature sensor, release the spring clips, and remove the upper housing and factory filter. The manufacturer warns that failing to follow the instructions or skipping the provided hardware may damage the intake tube, throttle body, or engine. Check all connections for alignment and tightness after installation, as the manufacturer recommends for K&N high-flow systems.
