GSC Power-Division 21-4N Intake Valve Set of 8-37mm (+1mm) (gsc2014-8) 18465 tuned intake tube to smooth

tuned intake tube to smooth and improve airflow to your engine

the ARK Performance component provides the performance edge you're after to turn heads and grab all the attention

Direct fit for 2003-2009 Mazda RX-8 R2-1

000-mile or 12-month warranty

GSC Power-Division 21-4N Intake Valve Set of 8-37mm (+1mm) (gsc2014-8) 18465 tuned intake tube to smoothWhen creating our new valve line we set out to create the best performance, longest lasting valves available to the aftermarket. Using advanced 3D design and simulation software, we have created a stronger and higher flowing valve head design. We flow test prototype valve heads in the specific applications to make sure we have the highest flowing valve head available on the market today. With the materials used, we have less valve distortion at the