The K&N 63-3516 is a 63 Series AirCharger cold air intake for the 1.5L inline-four in the Honda Civic. A high-density polyethylene (HDPE) rotationally-molded tube is meant to increase airflow to the engine. The kit also includes a washable, reusable High-Flow Air Filter featuring oiled cotton filter media, so you are not buying disposable paper filters. Compared with a cheaper filter-only swap, the advantage is that the whole intake path is redesigned, and the filter is rated for long service life.
The manufacturer says the kit reduces restriction and claims a guaranteed gain in horsepower and torque. It lists an estimated gain of 9 HP at 67.5 MPH, which should be treated as an estimate rather than a dyno guarantee. The application is listed for 2016-2021 Civic L4-1.5L fuel-injected models, so a 2016 Civic with this engine is covered. Because the kit sits in place of the factory box, the job is a true bolt-on, and the manufacturer describes it as a 1-hour install with hand tools. Long-tail searches this part targets include "2016 Civic 1.5L cold air intake," "K&N 63 series AirCharger install," and "washable oiled cotton Civic intake filter."
The manufacturer lists this intake for 2016-2021 Honda Civic L4-1.5L fuel-injected models, so a 2016 Civic with that engine falls within the listed application. If you are unsure of your build, confirm with the manufacturer before ordering.
The manufacturer says the filter only needs cleaning about every 100,000 miles under normal highway driving conditions. Because it is washable and reusable, you clean and re-oil it rather than replacing it at each service.
The manufacturer states that a typical installation takes about an hour or less and needs only simple hand tools. Because this kit replaces the factory air filter and intake tube, plan on working around the stock airbox and its connections. Confirm the install sheet with the manufacturer for the exact steps and torque specs before starting.
