Can I turn off the 02 sensor on the v.9 R30 U7135

[SRT8waggin]

I am just trying to sort out how to get around the rear O2 sensor on my exhaust. I pulled the cats off.

[Mike_Levy]

Nope. CMR dealer can. You can't. Plus you just cost yourself about 30hp at the wheels. That was the loss when we tried pulling the cats on my Heads/cam/headers Jeep SRT8. The Hemi doesn't like an open exhaust. It does like high flow cats.

[SRT8waggin]

I've heard both sides, with no data to back it up. I've seen data on other vehicles that shows a midrange improvement with cats removed but I have not been able to locate a dyno sheet that shows this is what happens on the SRT's

[mikel]

they have to be a restriction in the first place to see any gains....

[SRT8waggin]

Still no codes, pulls harder on top and there is a definite difference in around town driving. Need a few shake down runs and a visit to the track. Oh and they ended up just hollowing out the stock cats since that was easier than bending the pipe to get in there.