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so.... larger pipe diameter exhaust + free flowing muffler = low back pressure ? seriously how much could too much back pressure or too little back pressure hurt a NA motor?
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SLP loud mouth cat-back, Pro 5.0 short throw, 4.30's, Moser 31 spline axles, Eaton carrier, Steeda sport springs, chrome 18x9 18x10 Saleens, NT555's 285/40/18 rear, MAC O/R Hpipe, RAM power grip dual friction..... 
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