K&N Replacement Air Filter Round 11in OD 9-1/4in ID 6in H Suspension>Traction Bars A necessity when installing the

A necessity when installing the Ultra Street Intake Manifold on the 06-15 Civic Si

female connection can be used to filter the air coming out of your crankcase as well as keep contaminates out of your engine

It can be run as a single outlet with one outlet plugged

Our exclusive 4130 Chromoly Adjuster is CNC gun drilled to reduce weight and Blue Anodized Titanium Hardware shaves even more unsprung weight from the arms

6L 1979-1994

K&N Replacement Air Filter Round 11in OD 9-1/4in ID 6in H Suspension>Traction Bars A necessity when installing theK&N washable, reusable High Flow Air Filters feature a state of the art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide an increase in horsepower. Each performance air filter is reusable, engineered to last for the entire lifespan of your vehicle, and backed by K&N's 10 Year Million Mile Limited Warranty. K&N drop in replacement filters are designed to install easily into your