What size and build of engine? Dual 2.5 inch exhaust supports a lot of power. 3 inch may be too big. It could be the routing and the bends not the size of the pipe.
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Trey
Current rides: 2000 BMW 540i/6 and 86 C10.
Former ride: 1979 Trans Am WS6: LT1/T56, Kore 3 C5/6 brakes, BMW 18in rims
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