ZR-1 Net Registry Forums - View Single Post - I'd like to mod my exhaust, but it must be legal

We Gone · 11-11-2015

If you install headers you will do away with the cats as the stock cats are part of the stock exhaust manifold, headers you would have to add them aftermarket. The late model stock set-up flows better.
Everyone has their preference as to exhaust choice, Personally I like the sound of the old flowmaster best and have them on my 93, I have Corsa on my 91 for better flow. Both will pass sound laws but the Corsa is loud at WOT.

http://www.zr1specialist.com/HAT%20W...%20Systems.pdf

11-11-2015	#2
We Gone Join Date: Apr 2004 Location: Atlanta, GA Posts: 2,170	Re: I'd like to mod my exhaust, but it must be legal If you install headers you will do away with the cats as the stock cats are part of the stock exhaust manifold, headers you would have to add them aftermarket. The late model stock set-up flows better. Everyone has their preference as to exhaust choice, Personally I like the sound of the old flowmaster best and have them on my 93, I have Corsa on my 91 for better flow. Both will pass sound laws but the Corsa is loud at WOT. http://www.zr1specialist.com/HAT%20W...%20Systems.pdf __________________ Steve 1990 Steel Blue/Black #2355 1990 Red/Red #1473 1991 Quasar /Black #118 Sold 1991 Turquoise/Black #766 Parted Out 1993 Yellow/White #179 Sold 1990 Black/Gray #1361 Headers/4:10s Sold