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HVACDIESEL 08-13-2004, 11:04 PM MY buddy has a 2002 3500 express with an 8.1. WE are looking for a direct replacement muffler something that sounds good(flowmaster?)It is like the pick ups where it goes in 2 and out 1. also any body know of a chip for this van also snoman 08-13-2004, 11:37 PM Flow master makes a dual 3" in and single 3.5 inch out and as far as "chip" you can select from several aftermarket tuners to reprogram ECM. 8100hammer 09-06-2004, 02:40 PM westers garage (based canada) Nelson Performance Pcmforless or do it yourself stuff LS1edit Hptuners | ||