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Discussion Starter #1
Hey guys ive just bought my self a axle back flowmaster 40 series i just wanted sumthing for now to make it sound a little bit more mean i dont know how its gona end up sounding but tommrow im going to have it installed and weld my stock tips on but now i know with theese cars every thing u do has to have dyno tuned but do i really need to dyno tune it for a axle back flowmasters??
 
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