EH waste of $$$ if you ask me,, I made 298 WHP and 240 WTRQ, Stock headers and stock cats in a 7spd X coupe. For 40 WHP. Stillen's dyno is very generous at best, Their" 515HP SC kit" made 440HP( 365 WHP) before I was tuned. Stillen dyno= INFLATED..
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14 Q50 AWD, ARK, ECUTEK (SEB), Takda,