Check your cats...

[Big Daddy Kane]

Originally Posted by JANNETTYRACING

We have seen several sets of Kooks Cats Fail with superchargers.

Awesome! I'll be taking mine off!!

[JamesNoBrakes]

Seems like turbos make a LOT more sense, give a huge drop in exhaust temperature after passing through the turbine (and less stress on the crankshaft/engine). I know turbos can still get hot in the area of the cats, but it would seem with the turbine you'd at least be converting a lot of that heat energy into something usefull.

[Blacknight11]

This is what I'm confused about. Several large companies that install S/C who share this site use the oem exhaust when installing S/C. It seems that this issue is known so why are they using the oem cats. If I remove my kooks exhaust, headers and hi flow cats and put my oem parts back on how much HP will I loose . Also can instill use the 3.6 pulley

[Dukes117]

Just remove your cats ^. And you'll lose between 30-40hp.

[yotaman96]

For those of you that have full exhaust and removed your cats, how much louder did it get?!

[4thGen427CI]

So would it be better to have twin turbos and high flow cats. Or can turbos replace the high flow cats? I've heard of that but never had it proven so to say. But if the turbo can fix the heating problem and run through the cats and be fine for the cats. Just might be the direction I would rather take vs. supercharger.

[lionssfan]

Originally Posted by HumanWiki

Interesting.... I have a rattle in my left HF cat.. I've not opened the pipes to look at them though..

that's usually the a sign there breaking up by having rattles on OEM cats from my exprience being a mechanic and end up in the mufflers.

[lionssfan]

Originally Posted by JANNETTYRACING

$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ Check the Price of the cats for the ZR1 or CTSV

exactly big bucks, the insides look different too. oem has small holes on what looks like a gride or you could say honey cone looking. my kooks look like thin metal strips wrapped around the inside.

[lionssfan]

Originally Posted by JANNETTYRACING

Factory cats are More resilient than aftermarket cats and at 5-6 PSI it is not a problem.

Ted you suggest 3.6 pully with maggy if running long tube headers and cats right? or is that without cats? cats or no cats how does this effect boost. better to have a 3.4 pulley without cats? thanks

[Big Daddy Kane]

FUUUUUUUUNNN!! Making sure my cats don't clog up on me.

[coptzr]

Same issue here. Running a E-force, cam, SLP headers with cats. When Vector Motorsports was tuning it, we thought we had bad fuel because he could not get any timing in it without spark knock. Those guys are awesome and he set it safe and away I went. After a couple hundred boosted miles, I swore the rods were coming out of the motor, come to find out, it was the cat material rattling around. Removed then and found them TOTALLY destroyed. Gutted them and off we go. Just need to get it back to re-tune for some more HP!!!

[InvaderMoose]

Damn. About to put a whipple on my L99. Anyone know about the JBA competition exhaust system? V8 3" Cat-back System w/ 4" Dual Wall tips (3" to 3")

[2L82RUN]

Originally Posted by yotaman96

For those of you that have full exhaust and removed your cats, how much louder did it get?!

'Loud' is a subjective question. I went from stock to Stainless Works 2" long tubes, cam, no cats, and Borla S type exhaust. It's definitely louder than stock but not obnoxious. However, that is my opinion. Someone else may consider my car too loud. See video....maybe this will help. Near the end of the video I had my wife open the cutouts so don't freak out about that sound!! LOL

[IROCanSS]

LEMME HEAR A LIL BIT!!!

Here is 1-7/8" stainless works, no cats and American thunder by Flowmaster. Also opening cutouts. This is stock ls3 cam. I agree with the above poster, sound is subjective. I feel neither his nor my car is very loud until you open the cutouts!