best price is summit for the pacesetters, they come with decent gaskets, some 3.4s had A.I.R, they make them with an EGR provision, and you will notice a bit more aggressive tone, but the 3.4 top end flows so horribly poor that it won't make a huge difference in the exhaust note. It should line up with your factory exhaust, the Y pipe that is included fallows the same routing.
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2000 Tahoe Z71 5.7
1982 Z28 Pacecar 305
1999 S10
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