Klinux13

I have to do some work on my exhaust so it will pass inspection next summer, (no cats) and I thought while I have it all ripped apart, I might as well put in some headers. Its a 96 auto with a 302 and 4x4 short bed single gas tank.


Existing setup: 2” (inside diameter) true duals into Flowmaster mufflers and strait out under the bumper.


Planed setup: Long tube headers into existing pipes with hi-flow cats and hex tips.


My questions are:

1. Can long tubes fit this model? If not will shorty’s be worth it?
2. What cats should I get?
3. How much will the cats change the sound?
4. Do the hi flow cats need pipping and sensors?

~Thanks

Klinux13

When I get back I can take some pics.

unit505

I'm not the exhaust expert, but your going to need a cross pipe between the duals. X pipe or y pipe. The x pipe or y pipe aids in exhaust scavenging which helps the engine breathe. Maybe Dr. Bowtie or one of the others will chime in with "professional" explanation.

N.F-150

yeah you cant run true duals the O2 sensor needs to pick a reading from both sides of the engine, plus it is very hard to work around the transfer case/front driveshaft in a 4x4. I would get some shorties an a high flow y-pipe.

Klinux13

I already have true duals. I don't have a cross over pip and I have 2 o2 sensors.

N.F-150

what madness is this! how do you run 2 O2 sensors?

Klinux13

I'm just as puzzled as you! It came with that setup. Hmm... Maybe that has something to do with the fact that I'm only getting 13 mpg. For all I know it might have been cut and the wires shoved somewhere.

Klinux13

Didn't really answer your question. There's one right behind each manifold.

Thatonekid

I think the 96's actually came stock with dual 02 sensors I'm sure this has been gone over before.
Anyway I'd run and h-pipe, they help build torque and helps flow velocity, though an x pipe brings even more velocity but less torque

Klinux13

When I have it all ripped out I might add one then.