IS1

I've had mine removed on most of my cars including my IS300 and noticed a huge difference is performance and sound. How hard is this to do or can it even be done on a C32? Are there cats coming off the manifold or just inline before the muffler? Would you need to have an O2 simulator to avoid throwing CEL's?
Thanks

Karl G

And pollute the environment just to get more power? No thanks, that's a pretty selfish thing to do.

The easiest way to remove the cats would be to buy cat-less racing exhaust headers & piping. Check Supersprint, they might have something for you. And yes, you would need an O2 sensor dummy, all OBDII cars throw faults when the O2 sensor isn't working.

BenzoAMGpower

dont know about the C32, but after deleting the aftercats on my ML and leaving the 2 precats I lost some low end torque but I did pick up some horespower at higher RPMs.

pointman

1. youll fail inspection
2. lose hp low end
3. check engine light

dont lose the cat.

pointman

Benzo, did you cut out the resonators too? any negatives? thanks

BenzoAMGpower

i only deleted the 2 aftercats.. I still kept the centre resontor. The ML sounds aggressive enough as it is with the combination fo the RENNTech CF airbox and deleted aftercats!!! I was thinking about replacing the centre resonator with a magnaflow but I think I'm just going to keep the ML the way it is... no more mods!!

simonlam168

OH......Don't touch the rear cats..........
I have done it before........I put the cats back on!!!!!!!!

pointman

Benzo so not selling anymore huh? i actually sold my 55 a week ago... i think i got railed but i wanted to dump it.

BenzoAMGpower

still selling it... otherwise why would i stop modding... lol

Vader13

My resonator is gone, Sounds great! vvvrrrroooooooommmmmm

mbtech208

Keep the cats.

pointman

...thats why i thought you were keeping it.

BenzoAMGpower

oh, i did that one mod a long time ago!!!!! before i finally decided to get a C32!!!!

pointman

no, i mean cause you said"im just going to keep the ml..."

bverotti

you could get the metalic cats from MKB. I am not sure if they would be legal in the US however.

I put mine on about a year ago(+ the MKB headers) and it gives the cars a very different sound. When driving normally the sound level is just a touch louder. When flooring it the beast comes out !

I guess since the metal cats also have a slighte larger 'holes' it should give a few HP.

Bv

430

If you replace your cats with aftermarket remember Oval cats have greater surface area and will flow better.

I1 ULOOZ

me 2

pointman

without resonators...can you still pass inspection? yes right?

Bux

questions....what if i remove just my rear cats ..leaving the resonator in ...how will it sound compared to stock? basically the same right? and removing the rear cats since it's passed the O2 sensors anyway will dealer/inspection fail me?

Bux

but was that also without the resonator?