Start from the stock manifolds (or even better - get headers) and go with 2.5" piping all the way back. High flow cat, straight through resonator, straight through muffler for the best flow. If you want duals out the back, you can have a Y-pipe put in after it bends up and over the axle and then run both pipes into a seperate muffler for each side. With duals you won't lose power, but it won't really gain any either since it's not a true dual path system, it's more just for looks.
You could even go 2.75" pipe, but other people will tell you it's too big, even though it's not, so it's up to you. 3" on a stock 3400 would be getting too big.
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Last edited by Spilner521 : 08-08-2006 at 12:33 PM.
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