GSC Power-Division 23-8N Exhaust Valve Set of 8-30mm (+1mm) (gsc2283-8) _3.5 each set is balanced to

each set is balanced to within a 2% flow variation

Utilizing factory style flanges and this system is a direct bolt-on system

Borla S-Type Cat-Back Exhaust System for 2005-2009 Subaru Legacy GT 2

an engineer

Tired of drone but still want the full bodied 4

GSC Power-Division 23-8N Exhaust Valve Set of 8-30mm (+1mm) (gsc2283-8) _3.5 each set is balanced toWhen 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