Exhaust Question
#1
I bought my car (UK MY97) with an STi backbox on it. Is this any better than the standard backbox, and would I notice any power increase if I changed it for a stainless one. I quite like the 6x4 Magnex.
Terry
Terry
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Brzoza
Engine Management and ECU Remapping
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02 October 2015 05:26 PM