E55Rx

I'm looking at plm and kleemann for headers. I Like plm for ease of install, no cutting or welding. If I go plm I was thinking of keeping primary cat and deleting 2nd. With the klees I'd clearly need to remove primary cats but I'd likely keep the secondaries for cleanup and reduced gas smell.

Any input, advice greatly appreciated.

Thanks!

WANTED!!

I currently run Kleemans with none and I don't get a gas smell.










'

2000UZJ

Are you catless? My car smells like a giant go cart with no cats.

E55Rx

This is where I get confused because I do not want my car to wreek of gas if I go without cats. Furthermore ppl always say you lose some boost with removing all cats and adding headers. I was thinking doing the plm for this reason, keep the primary and delete secondary. Just doesn't seem very popular from what I've read on the boards.

Funk Season

i have eurocharged mids with only primary cat delete. Secondary cats, resonator, stocks muffler all intact. No gas smell and very quiet until WOT. No gas smell.

Hulk

EC or kleeman headers without cats, Plm have a bottle neck

2000UZJ

I have ARH LT's with no catalytic converters and I can't walk behind my car after it's been running for a while. I am having cats put back in as soon as I can. I'm no tree hugger (obviously) but don't like polluting this much or running the risk of getting pulled over. The smell is strong. I can't smell it while driving, but stop at a light and the wind blows it inside the car it can get overwhelming. I have a custom tune on my car, some have smells some don't.

WANTED!!

Yes sir. Mine has never reeked at all since I did the install.

Hulk

Thunderbolt race cats

2000UZJ

Thanks Hulk. I hope it tones down some of the sound as well. It's brutally loud

Hulk

Not by much but will help with the smell

SICAMG

Ok so if you where to put in some thunderbolt cats and say shut off the rear 02 sensors, will this be picked up on the smog test? My shop no longer does tests so cant hook up to see if the egr and air pump delete will be seen as not ready or not available as well.

Hulk

You can turn on the O2 sensors with the race cats, I had them and no codes.
If your sensors are turned off though you can't pass smog

SICAMG

Ok and do you have any experience with egr and air pump deletes?

Hulk

No I left everything on except sec pump

bierry

found this : https://mbworld.org/forums/w211-amg/...ml#post5570075