[phillyunderworld]

I Just Want To Know If It Is Possible To Gut The Cat And Retro Fit The 02 Sensors To Pass.also , Is It Worth It To Do So Or Will It f!@k Something Up?i Have A Standard Cooper Right Now With A Few Upgrades Such As Intake & Exhaust.should I Try This Or Go Another Path?one Things For Sure Though , Ineed More Speed .definitely!

[paul_c]

Hey Philly, did you sort out gutting your cat??
Mine has stopped working so was gonna do the
same until i get some cash to buy a new one!

[Thumper460]

Gutting the cat ..can be picked up with the sniffer emission!! Yes you can install O2 for the computer... however, like I said, you might not pass a sniffer EM test!!

Header install usually doesnt have cats, or supply a "Bypass" pipe to bypass the cats..yes??

Just me..............................

Thumper

[paul_c]

It was going to be a temp mod until i could afford a new cat. Yes it would fail an MOT test, as it's called over here, but this test is only once a year.
As it happens i bought an exhaust manifold and cat section from a '06 Cooper-s that had only done 1,000miles.

Superb price too!! ...Result.

[westycoopers]

i got told that loosing the cat can loose horsepower by not having enough back pressure, but i aint no expert

[paul_c]

Yes it is possible loss of back pressure would affect performance.
Fortunatly i got a new manifold and cat!! -She now drives like a dream!

[Richard Crofts]

Backpressure is less important on the cooper and one...its the supercharger that its more important on.

My cat on the S was shot at the last MOT and the car still passed (I had no cat cells in it!) ... unless your on a stupid tune the car will probably pss as the emissions on closed loop fueling on the MINI (thats an AF of around 14.2 i think) is quite lean so thats probably why it manages to go through???!

[James@fomsport]

i plan on running my cooper de-cat with a megan header

[Richard Crofts]

Ah just noticed your US not UK.... chances are it won't pas your emmissions tests with no cells in it.