more info needed
are you running stock exhaust
have up upgraded your fuel pump/injectors
boost levels? is it tuned to your car
have you upgraded your map sensor or are you running the reducer?
see i had issues with my kit but it was just a faulty knock sensor does your engine light come on?
my car when i boost and vtec it dont sound as mean as it used to but apparently i heard that its because of the manifold being to restrictive
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