thewarmachine

I installed my prochamber with Pypes high-flow cats today. I am very pleased with the sound. It's not terribly loud, but has a deep, aggressive, raw tone. At idle, it's only slightly louder than stock, but when I accelerate, it has a nice deep thumping exhaust note.

I cut off about 9" of the downpipes and spliced in the cats. My O2 sensors barely reach the bungs on the rear of the cats, but they should be ok. I used some aluminum wire to fasten them to the sides of the transmission. The cats came with plugs for the O2 bungs, so I used those to plug the two bungs on the downpipes. The only real problem I had was that one of the band clamps Pypes sent me was missing the curved washer where the nut goes. I'll get a new one sometime and fix it, but for now, it's holding without it.

Here is the offroad prochamber before modification.



A close-up of a cat.



Overlay of the prochamber and stock H-pipe.




After the modification and ready to install.



Here's a before video.
http://video.google.com/videoplay?do...6980&hl=en

Here's the after video. (sorry about all the dead space...I don't know anything about editing vids yet)
http://video.google.com/videoplay?do...11665497306877

howarmat

haha...keep us updated! that does look good and should sound very nice!

PiggySmallz

glad to see you are happy man. you finally got the exhaust done

thewarmachine

Thanks, guys! I'm very pleased with the results. I took my time and made sure things were done the right way.

The Prochamber is from Speed Concepts $366 plus $42 shipping.
The Pypes cats are from Jegs $175

Larmo

Prochamber makes a great sound... I love mine!!!

TOMBSTANG

glad to see you got it all figured out and found a set up you like.

harraid5711

niiiiiiice

PiggySmallz

sounds similar to the off road set up just quieter sounds good man

thewarmachine

Thanks for the compliments, guys.

I don't know what the deal was with my camera, but it just didn't pick up sound like it did in the first video. I think there was a slight breeze that distorted it. It is actually not as quiet as the vid makes it out to be. There is still some drone, but the tone of the drone is different.....more of a rumbling now instead of a humming. I love the sound it makes when I get close to 3000rpm in 3rd gear.

2007CalSpec

Glad you got it installed. They sound good. Did you notice the "VRRRR" noise around 1K rpm? Maybe not since you have cats. I wonder if it's something unique to going "off road" with the prochamber. Since I have boomtubes with the o/r prochamber I notice some trumpeting when I'm really punching it. I didn't have the trumpeting when I had just the boomtubes with stock H-pipe & cats. Maybe the trumpeting is caused by the increased flow in the exhaust with the off road pipes. Hmmm...I wonder if adding resonators would eliminate the trumpeting.