H3 Gibson Extreme dual CAT back exits behind each rear tire

[Burnoffski]

Hello all I am considering the above exhaust system for my 07 H3. They also offer dual straight out of the back but I like the look of the side outlets (is there an advantage to one or the other??). I am asking for reviews of either or both of these systems from anyone on here that has had them on their H3. Positive an negative reviews welcome. What I am looking for is a little more sound and performance from my 3.7L I5. I have already replaced the filter with a K&N filter but just in the stock box because as far as I can tell it is already a CLOSED cold air system. My only questions around intake are 1. Is there a baffle of some sort on the intake from outside that can be removed or opened up? and 2. How do you remove the outside cover where the air is being puled in?

 

[Mb30sdl]

Airbox is connected to inner fender and pulls fresh air from there. U can remove wheel well lining and see it. Rec to install snorkel to get more fresh air in.

 

[rsc]

Pull the airbox, 3 bolts hold it down. On the side of the airbox is a coupler for the firewall, it is pretty restrictive. Remove the coupler and use a short piece of tubing through the fender to breathe. Trim the hole in the fender with rubber seal trim and viola.

 

[alrock]

If you wheel your H3, the chances of crushing the exhaust behind the tires is more than crushing at the end. Though, if exiting out the end and you have tips, they can look like this.

I still run this exhaust without tips and it's been fine since.

 

[Burnoffski]

If you wheel your H3, the chances of crushing the exhaust behind the tires is more than crushing at the end. Though, if exiting out the end and you have tips, they can look like this.

I still run this exhaust without tips and it's been fine since.

Thanks for the tips and advice.... I do go wheeling but so far it's been pretty mild but I can see it getting more extreme in the future. Maybe I'll get the rear exits but that side exit sure looks sweet!

 

[Burnoffski]

If you wheel your H3, the chances of crushing the exhaust behind the tires is more than crushing at the end. Though, if exiting out the end and you have tips, they can look like this.

I still run this exhaust without tips and it's been fine since.

Oh and I forgot... How's the sound from the Gibson?

 

[alrock]

Oh and I forgot... How's the sound from the Gibson?

cbetts likes it, I'm less of a fan. With the removal of the resonator, there's significant drone especially for back seat passengers.

 

[rsc]

I wonder what it would sound like with a low restriction, flow-through "muffler" in place of the resonator? Would a glass pack or something kill the drone w/out killing efficiency and power?

 

[alrock]

Dunno. BTW, I cut off the 2nd cat (unmonitored on 07+) and it improved the sound, though it's a bit louder than before. Did pass emissions yesterday.

 

[Burnoffski]

Dunno. BTW, I cut off the 2nd cat (unmonitored on 07+) and it improved the sound, though it's a bit louder than before. Did pass emissions yesterday.

I imagine there was a noticeable improvement in sound and performance with the 2nd cat removed.

 

[alrock]

I did not notice any performance change but it was louder and a better sound

 

[Romeo]

The 06 models have a sensor on one of the Cats right? How could be bypass and not throw any codes?


Sent from my iPhone using Tapatalk

 

[alrock]

All models have two O2 sensors. One before the cats. In 2006 the second sensor was after the second cat. 07 and later the second sensor was after the first cat. The second cat is not monitored 07 and later