So you are saying that you got 13 whp from just the muffler? Seems high...
2012 Audi R8 V10, 6MT, Suzuka Gray, Capristo X-Pipe, Klassen M52R, GMG springs, GT tails, GT wing, Cosmetic mods
2015 BMW X5 35d, Mineral White
2016 MB C63S, Steel Grey
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