Im a Stillen man myself. F.I. seems pretty good though & much louder. Gains are about the same I believe. I feel that the Stillen has a cleaner look to it. It has a very nice sound without attracting too much unwanted attention also.
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Ryan
314WHP | 260LB-FT | STILLEN | KONI | SWIFT | STOPTECH | Z1 | PROJECT MU | CNT | UPREV | FORGESTAR | BRIDGESTONE | PWJDM | ENEOS | MOTUL
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