Semtex, Tony might be right because if I remember correctly, the diameter in the Stillen exhaust varies from head to toe. Its something wierd like 2.25 > 3?? > 2.25 > 2.5 > out. Please dont quote me, I just thought I remember thinking that to myself when I hacked up the exhaust. They dont use a consistant diameter throughout and that might be a restriction as it reaches the top.
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Performance GTM Stage 1 SC, GTM Res.Test Pipes, Invidia Gemini Exhaust, GTM HD Oil Cooler
Wheels & Suspension AME Tracer TM02's 19x9.5F 19x10.5R w/ 265x35F & 305x30R, Hotchkis Sways, BC (BR) Racing Coilovers (Car Sold)
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