Exhaust information help...

[tireburner163]

Originally posted by The Deuce
A true o/r X or H takes off the cats and moves the balancing tube up there. That's why they flow so well.

A traditional cat-back is from beyond the mufflers to the tips.

You can get a catted X or H that goes where the o/r pipe would, right behing the headers, but has high flow cats that should pass sniffer emmisions. Passing a CA visual is a whole different story.

Even the stock H-pipe has a cross over tube....that's why it's called a H-pipe. A aftermarket peice just has a bigger diameter and either no cats or high flow cats.