The K&N 63-3090 is a cold-air intake kit from K&N's AirCharger line, built for the supercharged 6.2L LT4 V8 in the C7 Corvette Z06. It replaces the factory air filter and intake housing with a high-flow, oiled cotton-gauze filter on a dedicated intake tube. The manufacturer says the design reduces airflow restriction for a guaranteed gain in horsepower and torque, and that K&N dyno-tests its systems in-house. A generic drop-in filter keeps the stock airbox and offers no comparable tube redesign. The filter is also washable and reusable, so Z06 owners who track their cars can clean and re-oil it instead of replacing a disposable element. Searches for "C7 Z06 supercharged LT4 cold air intake," "63-3090 carbon fiber Z06 intake," and "2015 2016 Corvette Z06 CAI" point to this exact kit.
Fitment deserves a close look before you order. The manufacturer's product listing covers 2015-2019 Z06 models, while its installation article focuses on 2015-2016 cars. Its materials also describe the tube as roto-molded HDPE in one place and carbon fiber in another. Owners on user forums have described a carbon-fiber version fitted to a C7 Z06, so confirm the model year and tube material with K&N before buying. The kit is not legal for sale or use in California on pollution-controlled vehicles. The manufacturer has described its separate 57-3090 carbon intake as a 50-state legal option for 2015-2016 Z06 models. The manufacturer also says installation typically takes about an hour and that mounting hardware is included, which makes this a realistic weekend project for a home mechanic.
The manufacturer states that the 63-3090 is not legal for sale or use in California on any pollution-controlled motor vehicle. K&N has described its separate 57-3090 carbon intake as a 50-state legal option for 2015-2016 Z06 models, so California buyers should look at that part number instead.
The manufacturer notes that the carbon intake tube for 2015-2016 Z06 models has a provision for the factory mass airflow sensor molded into it. The sensor is mounted to the K&N tube during installation.
According to the manufacturer, the filter is washable and reusable with K&N's Recharger air filter service kit. Owners do not need to buy a replacement filter to maintain it.
Per the manufacturer, installation typically takes about an hour, and the kit includes the mounting hardware needed. Expect to remove the factory air box, transfer the mass airflow sensor to the K&N tube, reconnect the crankcase vent lines, and secure the heat shield and filter. Common hand tools are generally sufficient. Pay close attention to the sensor orientation and vent-line routing shown in the manufacturer's instruction sheet, and make sure every hose clamp is fully seated. Recheck clamp tightness after your first few drives, because intake connections can loosen as the engine bay heats and cools. Use the instruction sheet for this exact part number before you start.
