That's hard to believe any way you cut it, My car with Stillen Gen 3's and Exotic Speed cat back( True Dual 2.5) Stock cats made 298 WHP (UPREV) .
With the Stillen kit and "their Tune" car only made 342 WHP( Tune was CRAP) ? I went custom tune and got 412 WHP so I gained 114 WHP and you gained 107 so not that far off, Was your car dyno'd at their dyno for the 279 run? If not their dyno could be SUPER LOW!
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14 Q50 AWD, ARK, ECUTEK (SEB), Takda, 
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