Not a whole lot left without doing a built engine. Maybe test pipes and headers, but i doubt you would reach 350hp. I would focus more on getting that power to ground after the UpRev tune. Maybe upgrade the LSD, clutch and flywheel.
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[09][MB][6-Spd MT][Touring][Stillen Gen III][K&N][Borla CBE][Evo-R]
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