K&N 01-17 Harley-Davidson Softail / Dyna FI Performance Air Intake System - 57-1137

K&N FIPK air intakes for select Harley-Davidson Touring, Softail, Twin-Cam and Sportster motorcycle models increase power by eliminating the restrictive stock OE air cleaner and replacing it with a...

K&N 08-17 Harley-Davidson Touring Models Performance Air Intake System - 57-1134

K&N FIPK air intakes for select Harley-Davidson Touring, Softail, Twin-Cam and Sportster motorcycle models increase power by eliminating the restrictive stock OE air cleaner and replacing it with a...

K&N 11-14 Polaris RZR 900 875CC Performance Intake Kit - 57-1129

A high-density polyethylene (HDPE) rotationally-molded tube helps increase the volume of airflow to your engine, and provides a guaranteed increase in horsepower and torque. These systems are paired...

K&N 01-05 BMW M3 3.2L F/I Performance Intake Kit - 57-1003

A high-density polyethylene (HDPE) rotationally-molded tube helps increase the volume of airflow to your engine, and provides a guaranteed increase in horsepower and torque. These systems are paired...

K&N 99-05 BMW 3 Series Performance Intake Kit - 57-1002

A high-density polyethylene (HDPE) rotationally-molded tube helps increase the volume of airflow to your engine, and provides a guaranteed increase in horsepower and torque. These systems are paired...

K&N 00-05 BMW 330 L6-3.0L E46 Performance Intake Kit - 57-1001

A high-density polyethylene (HDPE) rotationally-molded tube helps increase the volume of airflow to your engine, and provides a guaranteed increase in horsepower and torque. These systems are paired...

K&N 92-99 BMW 3 Series Performance Intake Kit - 57-1000

A high-density polyethylene (HDPE) rotationally-molded tube helps increase the volume of airflow to your engine, and provides a guaranteed increase in horsepower and torque. These systems are paired...

K&N Audi A4 1.8L Turbo 150BHP Performance Intake Kit - 57-0593

K&N 57i Series induction kits are specifically designed for each different vehicle and will free your car from the size restriction that comes with the factory air box. These economical kits can take...

K&N Audi A4 2.8L V6 Performance Intake Kit - 57-0515

K&N 57i Series induction kits are specifically designed for each different vehicle and will free your car from the size restriction that comes with the factory air box. These economical kits can take...

K&N Performance Intake Kit AUDI TT QUATTRO, 1.8L, L4, 224BHP - 57-0479

K&N 57i Series induction kits are specifically designed for each different vehicle and will free your car from the size restriction that comes with the factory air box. These economical kits can take...

K&N Performance Intake Kit MAZDA MX-5, 1.6L, 16V, L4, MPI, 114BHP - 57-0047

K&N 57i Series induction kits are specifically designed for each different vehicle and will free your car from the size restriction that comes with the factory air box. These economical kits can take...

K&N 59-74 Rover Custom Round Race Filter Length 6.56in Width 6.31in Height 2.25in - 56-9335

K&N Custom Air Filters for Single or Two Barrel Carburetors - K&N custom air filter kits are designed to boost performance from your carburetor while keeping the dirt on the outside where it belongs...