Can anyone tell me, what size pipes are factory correct for my 70 Coronet R/T, 440 engine ?
My H pipe is 2 1/2" od., which is I believe correct for my car. But i do net have the rest, which I need to find. What sizes are the mufflers, tailpipes, and chrome tips? Are they all 2 1/2" diameter all the way back, or, does the system somehow get reduced in diameter to 2 1/4" after the H pipes?

How does the factory setup go?

Thanks!
Paul

Reduced to 2 1/4 at muffler,2 1/4 tailpipe