The K&N 63-3517 is a 63 Series AirCharger cold air intake for the 2.0L four-cylinder Honda Civic. The system can typically be installed in less than 60 minutes, and it replaces the factory air filter and intake tube with a roto-molded HDPE tube and an oversized oiled cotton filter. The custom heat shield keeps the filter away from hot engine-bay air, which matters for the cooler, denser charge that drives throttle response. Compared with a stock airbox or a basic drop-in filter, the larger filter and smoother tube path are the reasons to pay for this kit. The manufacturer states the intake is guaranteed to increase horsepower and torque and carries a No-Hassle Lifetime Limited Warranty.
This kit suits naturally aspirated 2.0L Civic owners searching for a 2016 Civic 2.0L cold air intake, a roto-molded intake tube, or a reusable oiled cotton air filter. It is not intended for the turbocharged Type R, so confirm your trim and model year before ordering. Because the manufacturer's application listing and other sources show different year ranges, verify your exact model year with the manufacturer. If you live in California or another CARB-adopting state, confirm emissions legality before buying. The DIY process uses common hand tools and factory mounting points, and the manufacturer advises keeping the factory intake rather than discarding it.
The manufacturer recommends that customers do not discard the factory air intake, so store it in case you return the car to stock or need it for resale.
The manufacturer states the filter only needs cleaning about every 100,000 miles under normal highway driving. When it does need re-oiling, the manufacturer's Filter Recharger service kit (part 99-5050 or 99-5000) is the recommended option.
Per the manufacturer's instruction sheet, you will need a flat-blade and Phillips screwdriver, a ratchet with extension, a 10mm socket, 3mm and 4mm hex keys, and pliers. Start by disconnecting the negative battery cable, but first write down radio presets and anti-theft codes, since disconnecting the battery can erase them. Use only the hardware included in the kit, because the manufacturer warns that skipping it can compromise the installation. Expect to trim the edge trim during installation, and reconnect the mass air sensor and crankcase vent hose carefully. The manufacturer also recommends periodic checks of clamps and connections for alignment and tightness.
