IAG Air Oil Separator Kit FA24 WRX DBA4000 GSC's high performance single conical

GSC's high performance single conical valve spring kits

The result is an improvement in both durability and motorsport-level drivetrain responsiveness

STI MY06-21 MT TY856 w/ DCCD

The plug gaps are controlled with laser precision throughout the manufacturing process and should not be re-gapped unless absolutely necessary (due to the fragility of the center electrode)

IAG Air Oil Separator Kit FA24 WRX DBA4000 GSC's high performance single conicalKEEPS OIL OUT OF YOUR INTAKE The IAG air oil separator (AOS) is the most effective method of separating oil out of the crankcase gases before they are circulated back into the intake system. Removing the oil mist is critical for maximum reliability and longevity in motorsport and street performance applications. Oil in the intake system contributes to carbon build up on the back of the intake valves choking off airflow and reducing performance.