sd455
New Member
I know my 95 was NOT 3" coming out of the muffler, and was barely a 2.75" pipe. Not to mention how restrictive it was in the bends. You WILL notice an improvement by going to a 4" pipe over the stock pipe even straight piped. 3" is all that is needed so long as it is mandrel bent, but the stock system would be lucky to flow what a 2.5" mandrel bent system could. And a tune on a stock straight piped exhaust would be an EGT NIGHTMARE!
And after talking with Leroy this morning,I have ditched the strait pipe idea. DE 4" with new downpipe,and also now thinking about an S&B intake,probably easier than sourcing a K47.