I have the Borla/Mopar exhaust system and am happy with it. I was thinking about adding a Maxxfab 3" Downpipe w/highflow Cat. and their reducer that requires cutting 3 inches off the front of the Borla to eliminate the 2 1/4" bottleneck at that point. How much power increase and noise level might occur from making this exhaust upgrade? Should I consider their 3" O2 pipe as well? Don't know the dia. of the stock one?
Thanks

 

You'll lose a little low-end tq by adding the Mod but, you feel it at mid-top end. the noise will be a little louder with an additional popping. The Stock O2 housing is 2 1/4". You can go that angle with the 3" if you're planning on going with a bigger turbo. One tip, installing it is a REAL PAIN[&:][&:][:@]

 

Oh, small pair of hands NEEDED.........^^^

 

I am running the 3" d/p to a cut borla. Great setup - only issue is re-aligning the tips after cutting down the borla. That is a bitch(haven't quite got it, yet). The dp makes a big difference.

On the O2 housing...if you are not going to upgrade the turbo and s2 or boost controller...is as far as you plan to take the car, then go for it. It will definitely help. If you may go s3r of other big turbo, it is a waste, since you won't be able to use it with either.