LONG Thorley Tri-Y headers (collectors equal with the trans mount crossmember on the 700r4) and factory GM true dual 2.5" exhaust with a X-pipe added. The exhaust was factory from under the driverside middle passenger seat where I added the X pipe to the tailpipes. Then I had my local muffler shop bend up 2.5" pipes to connect the header collectors to the X-pipe.
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