2004-2007 STI

The RP-5113 Universal Air Filter is constructed from an oiled cotton filter media. It comes with a carbon fiber top for strength and durability. Th...

K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, ...

K&N premium oil filters are meticulously engineered to offer outstanding filtration and engine protection. Designed to operate with all synthet...

Gain a guaranteed increase in horsepower and torque with a K&N cold air intake system featuring a mandrel-bent aluminum intake tube. Each syste...

K&N washable, reusable High-Flow Air Filters feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and...

K&N washable, reusable High-Flow Air Filters feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and...

As the leader in forged racing pistons, JE Pistons has applied over 75 years of experience to its wide range of premium forged pistons for European...

As the leader in forged racing pistons, JE Pistons has applied over 75 years of experience to its wide range of premium forged pistons for European...

As the leader in forged racing pistons, JE Pistons has applied over 75 years of experience to its wide range of premium forged pistons for European...

As the leader in forged racing pistons, JE Pistons has applied over 75 years of experience to its wide range of premium forged pistons for European...

Is your engine choking for air and in need of some additional horsepower? If so, Injen has exciting news for you! The SP series of cold air intakes...

Is your engine choking for air and in need of some additional horsepower? If so, Injen has exciting news for you! The SP series of cold air intakes...

Add easy horsepower to your ride with the Injen Technology IS Performance short ram Air Intake! Our engineers spent abundant amounts of time design...

Injector Dynamics 1340cc Injectors-48mm Length - 11mm Gold Top/Denso And -204 Low Cushion (Set of 4)

Injector Dynamics ID1050X Injectors WRX-16B Bottom Adaptors 11mm (Red) Adaptors (Set of 4)