They look the same, but I think the ABH pipes have a different bore- larger. The pipes are also different lengths.

My car is running a hybrid exhaust. ABH rear section after the cat pipes. PT cat pipes and crossover pipe. The PT cat pipes are shorter by several inches.

I simple broke up the CAT coreson mine, and left the boxes in place.

De-cat pipes are probably best getting made by any decent exhaust company, but there are a few concerns.
- don't let them make any mods to the crossover pipe. I've seen several nasty by-pass efforts where the cross over pipes we're cut, making future serviceability difficult.
- if you must, get bypass pipes made with mounting flanges. The flanges from the existing cats would do.

As a starting point, why not do as I did, and empty the cat boxes on both cars, and leave them in place. Test the emissions, and see how you go. You might be pleasantly surprised, and it may be much cheaper.

Zuletzt bearbeitet von Mark Hanman; 07.10.2014 09:43.
85 WR quattro
90 V8 Silver, 91 V8 Black, 93 V8 Lago
93 100e quattro V6. Titan, i think