My 97 has the diamond eye 2piece downpipe, 3 into 4inch.... I had to grind the lip on the firewall and thought i had enough clearance.... Well, when i would sit in the truck and hit bumps it would still hit intermittently, so marked the dp with a marker where it was near the firewall, and dimpled the down pipe about a 1/4inch in that area.... Works excellent now, and no more rubbing.... I noticed a definate difference, but i went from stock exhaust to a complete diamond eye system..... The whole kit fit excellent!
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