I have a complete rebuilt engine and am confused about the exhaust? I have piping that is 1.5" all the way back. I have a new magnaflow cat and a flowmaster 44 on its way. I believe my pipes are too small? Other posts are saying to run 2" manifold to muffler and 2.25" muffler out. The engine is stock with stock manifolds. I am reluctant to return the new pipes. If I did where do I go to get the 2" and 2.25" and how much $ are we talking. WHAT WOULD HAPPEN IF I KEPT THE 1.5" PIPES?

 

return the pipes and go to your local muffler shop for the size you want.

 

2-2.25" is fine for what you're doing.

 

SURE is a pretty motor..... If it runs as good as it looks......... Your in good shape!!

 

didnt you just post about this?

 

engine looks good. if your pipes are too small, you'll have a lack of power. probably run rich at WFO.