i have top speed test pipes and they have good welds on them and they are fine. the hiss is not unbearable. there is some rasp to them but tp's give you good gains for the money.
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2 plus 2 times 2 = ? ... hint, it's not 8 
Stillen CBE, Stillen Gen 3, TP's, Uprev tuned - 324whp/264tq
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