wanttogofast

i did a flow master 40's and just cut the second cats off my stock H-pipe sounds great and didn't cost much

s94658

Yea I was thinking about doing this. How much louder did it get by removing two of the cats?

Also to the guy above, I already have 4.10s, SCT programmer on the way as well as an american thunder cat back. So an aftermarket catted H pipe and the factory one dont have much of a difference in terms of sound. I would think going from 4 restrictive cats to 2 high flow cats would change it quite a bit.

s94658

After thinking about it I may just go with an O/R one and switch back to stock for inspection time. Is there a way to keep the SES light from going on with an O/R pipe??

wanttogofast

not loud at idle but put you foot in to it and its got a nice sound

TRUEBLUE3934

I'm not cetain about that, which is why I asked anyone with specific experience to chime in.

However, I DO have a catted H-pipe for my long tube headers (it has only 2 high flow cats). When I take off my O/R H-pipe and install the catted one for inspection purposes, the car sounds nearly silent by comparison. I am guessing that any cats in the system will significantly dampen the sound. I think that 2 cats will dampen the sound only a little more than a 4 cat set-up. I am certain from my experience that the 4 cats are not twice as sound damping as just 2 cats are.

BTW, you will LOVE the 4.10 gear when you get them installed!!!

s94658

I know I cant wait to get the 4.10s put in. It doesnt seem like there is much out there for H pipes with the factory exhaust manifold or headers. It seems like everything is for longtubes. What is my best option for an O/R H

chasen1982

I think you're doing the right thing by going H pipe.. I went X pipe on the car I had and it was just to raspy. I wanted to put the factory mid pipe back on.. Id get a H Pipe with no cats.. else like stated before you aren't going to notice enough difference for the price you will be paying. Plus it's cheaper.. thats an added bonus..

s94658

Yes I def dont like the X pipe sound. So can someone chime in and tell me my options for O/R H pipe on stock headers. When I search the H pipe selection seems scarce compared to X, and the H pipes that I do find seem like they are all for use with LT headers.

s94658

I found the mac h pipe that would work on the stock headers but Ive heard that mac is ****. Correct me if Im wrong.