[Goracks69]

Hey guys,

I've got a 1999 v6, and I have the duallie exhaust H-pipe adapter with GT takeoff catbacks. I want to get some Mac longtube headers, but I have to meet Ontario emissions standards, so I NEED to have Cats as this is also my daily driver. I'm just wondering if there's a way to have Mac lts, high flow cats, h pipe adapter and GT catback takeoffs? Thanks in advance for any help.

 

[Redlyr]

First off, wrong section.

When you install LT headers, you can use GT midpipes.
You would need something like this:
BBK Mustang Shorty H-Pipe Catted (96-04 GT, Bullitt, Mach 1 and Cobra) at AmericanMuscle - Free Shipping!
Then add on any GT catback and you are good.

(you will also need some O2 extension because of how far back the longtube headers will put the converters.)

OR
You can have a shop shorten the H-pipe you have, add some flanges, and then weld in some high flow cats.
http://www.americanmuscle.com/pypes-ceramic-catalytic-converter.html