jslee225

I got lucky. Shop had to take off headers to perform some work and they noticed basically 100% degradation of the cats. Basically everything inside the cat was gone.

for people that track the car with aftermarket cats I would definitely reccomend you check your headers before every track event which will get old quick! You need to do this so you don't have all that debris suck back in the engine and could cause you to replace the entire engine which is not covered by warranty!

Point is if you track no point in getting cats bc it won't last and could ruin engine. Wish someone would have told me this before.

BGB Motorsports

For what it's worth, we had a failure on the factory ClubSport manifold too because cats really can't handle the long straights at WOT. While Cargraphic has offered to suggest a more Motorsport oriented cat, if you're using the car on a race track and off-road, following this information we are suggesting catless headers for off-road use only. The owner of the company just pinged me after reading the comments so please let me know what we can do to resolve the issue and again, if you've already had your shop determine they're failing, I'm not aware so I apologize if that's the case and I'm not up to speed. Sometimes on the 987.2s the cats would free up and cause a CEL on when running a stock file but if you've looked in there and have seen them breaking down, this is the first I'm hearing about it. I can get with Cargraphic on Monday and see what they want to do but I know their stance and everyone's on tracking. Those that don't go on track, this is not a concern.

I hope you're recovering well and on the mend Jacy.

@JSLee - did we sell you manifolds as well?

jslee225

no sir. Other popular brand on here.

Thanks for addressing! May need to switch to cg just for customer support.

BGB Motorsports

I'm just trying to do damage control and it's clear to me that going forward, even tho a lot of folks want headers with cats to avoid a need for a tune and pass emissions, if you go on track, longevity will be compromised. I am subscribed to the thread...anyone else who wants to weigh in, please do. Remember though, even the factory header on the race car with the cat has the same issue.

Spyerx

Not really seen this breaking apart on the factory Porsche gt3 parts. Many many track days on cup headers which are 100 cell cats.

Anyway if your cats are falling apart just finish the job and bust out all the material. Headers. Old Skool jdm style lol

jslee225

I didn't think of that! In retrospect I should have tried that haha.

supercup

This is interesting and more information is warranted - can those who had the cats fail on the CG sport headers or other brand let us know what other modifications you had made to your car (TB, Tune, Plenum etc.) and who the mfg. of each of those parts might have been to see if there any common parts involved?

Any idea on what has been the cause - excess heat or poor mfg. quality of cats? Could it be the result of the tune, the conditions at the track (hot humid day) or ?

Are all MFG.s using same cats? Fabspeed, Cargraphic, Dundon, GMG etc.

Seems like once again there is a track solution and a street solution - but stock may be the all around solution!

jslee225

Car was stock for me, but I do live in south texas where it's freakin hot

Ferrarisimo

Issues that people might be having with aftermarket equipment aside, the level of service that BGB provides is pretty damn incredible. I've been on car forums for a long time, and I've never seen that kind of attentiveness that BGB pays to their customers that they do on RL.

And in the case of CG, BGB is just the middleman! Very nicely done.

Alan C.

Most of the aftermarket cats I have seen lately are metal foil in construction. I believe the factory cat is a ceramic monolith. When the ceramics start to fail they will frequently begin to melt and block off part of the flow. The metal foil will fracture and result in metal shards going downstream of the cat.

If the cat is ceramic you can use a 3/8" drive to break up the ceramic and shake it out of the shell. If it's metal you may be in for a lot more work.

Yargk

Just to confirm, you installed the 82 mm TB and plenum, with no other modifications, and eventually you had no CELs? Did you dyno before and after? I like the idea of simple mods that boost power modestly (but also proven, no butt dyno) and don't require tuning.

d00d

Be careful to not breathe the precious metals dust when gutting a catalyst.

Yes, no tune or other performance modifications other than 82mm TB and plenum, and no CEL after a few starts.
I didn't dyno, and Dundon reports no improvements with these components so far, but I've noted more intake noise and maybe some increased HP.
Removed the rear of engine carpet pad and there was way too much at that point, so reversed that.

Jimmy-D

I guess what I would like to know is do the stock headers also suffer the same demise after 6-8 track days?

If so - are they covered by Porsche??

user1029

The best part of catalytic converters failing is when the junk cat material happens to destroy the front O2 sensor, then bye bye motor?

http://www.planet-9.com/987-cayman-a...d-headers.html

"Race headers for racecar" Always

d00d

Looks like FS had used an unnamed brand 100 CPSI metallic catalyst that require strengthening rods, then switched to the quality HJS 200 CPSI metallic catalysts that don't;
http://www.6speedonline.com/forums/9...00-cell-2.html

The metallic matrix catalysts also use ceramic as a coating, but are more resistant to race condition impacts than a ceramic matrix, from http://www.hjs-motorsport.de/downloads-en.html;