I've searched to no avail...Everyone so far that I've heard of (including myself) with an 05' that tried TESTPIPES got a CEL.... I'm wondering if anyone has tried CRAWFORD cats on an 05' yet.??? CEL or no..?? I know the 05's ECU is a bit more sensitive, and thats why I'm asking this...I also couldn't handle the rasp of my TP, and apparently CRAWFORD is the only cat that has been somewhat proven to not rasp....therefore i t's pretty much the only cat replacement I'm gonna consider.. (even tho they co$t a grip

 

Not to sound like an @ss, but the CEL issue is a NON issue. It can EASILY be taken care of NO WORRIES.

the issue with the rasp is more than just a tp vs resonated. It has a lot to do with the exhaust you run. I have a bit of rasp on my car - Greddy evo2, labree resonated test pipes, topspeed headers. The thing is, there is only a slight amount of rasp under light load. under full load there is NO rasp. for example, if I sat and reved the motor, you would hear rasp. If I accelerated off the line, you would hear no rasp.

If you choose an exhaust that has decent mufflers and resonators, like the greddy or hks, rasp will be kept to a minimum even with unresonated test pipes.

I wouldn't trade the small amount of rasp you get with test pipes to run hfcs. If that's the case, you should just throw the stock cats back on IMO.

 

Crawfords will work with the 05.

 

^ dude for me the CEL is an issue.. why would I spend $500 on crawfords if I'm gonna get a CEL!?!? If I'm paying that much I want a hassel free product Like I said before man.. I really don't want to have to drill holes in my cats if I can avoid it....

I wonder if there is even anyone out there who has crawfords on an 05' yet..?

 

well thanks, but is that an opinion or fact?? Do you know someone with an 05' with crawford cats..?

 

dude lets be real.. rasp is 99% from ur cats no matter what exhaust or other bolt on's you have..Once you have raspy cats/TP, different exhausts only make it LOUDER or raspier... I've yet to see someones exhaust lessen the rasp.. including my own

 

I am about to buy them for my car. Talked to Doug and he said that they should work.

 

well keep me updated please!! cause everyone told me the helix TP wouldn't throw a CEL..and it did for me along with others after me.. (but I got my 05 in 04, so nobody knew the ECU was more sensitive)

 

In know for a fact -- no CEL.

 

you have them on your car...? If so this is great news!

 

If for $9, you have a proven fix for CEL why is it an issue?

THERE ARE ABSOLUTELY NO HOLES THAT NEED TO BE DRILLED IN ANY PIPING ON THE VEHICLE. THE HELP! METHOD IS 100% COMPLETELY REVERSABLE IN A MATTER OF 2 MINUTES.

 

Who told you that? I bought my 04 in 04 and knew that it would throw a SES light if you replaced the cats with test pipes. The o2 thing is SO SIMPLE. The sensors just compare agains each other to see if the exhaust on the downstream is cleaner than the upstream. ANY HFC WILL BE CEL FREE - as long as the cat is working. IMO, HFC are a waste of money as MOST will burn out in a relatively short time (20-30K miles if not sooner).

 

hmmmm..maybe I didn't quite understand it then.. I thought you had to drill itno ur cats/TP...either way I'd "like" to not have to do anything...but It looks like I might have to

So..I'm guessing TP won't wear out like cats then..? Thanks for all the info You know alot more than me about this ****

 

I am not saying for sure HFC will burn out, but it has been my experience with them that they don't have as long a life as stock cats. The helix HFC are what I would recommend for HFC if I were buying them. The type of material they use is more durable (the metal in the catalyst). If you absolutely can't stand any rasp, stay with HFCs. I just don't think it's worth the trouble of swapping out the stockers them out only to put another cat in it's place, but that's me. Essentially, test pipes won't wear out.

 

hmm.. yeah but from what I've heard in person and read on here, most high flows have just as much rasp as testpipes Or close to it...thats where the tough decision is... I really don't want my car to sound like it did with the helix TP..whether I get a cel or not, that rasp was unbearable

 

i know that the crawford hf cats will NOT throw a SES on an 05 g35c, so it should be fine for your z.

in most if not all cases, if you have an 04 or 05, test pipes(res. or non-res.) will result in a SES light. the only model that MAY get away with test pipes are 03 models only and this may even be on a case by case basis.

 

To give you an idea, here are clips of my car under load:
Pull away

Dyno Run

Hear any rasp? No? I thought not. that is with Greddy evo2 exhaust, labree resonated test pipes, and topspeed headers. Now, if I sat and just revved the motor at a stop light, you would hear a bit of rasp. there are a lot of factors that play into whether or not you have rasp. The two major ones are the type of catback you have and the type of testpipes/cats you have. Others are possibly the type of headers you have and the thickness of the testpipe piping itself.

What exhaust are you running?

 

1st off nice ride

But yeah.. my car sounded fine at WOT too.. you couldn't hear the rasp.. it's the low rpm half throttle that I was annoyed with....

I have a popcharger, kinetix v4, pro-1 y pipe, and borla CB (not true dual) helix testpipes were on when I just had the popcharger and everything else was stock.. sounded shitty...threw on the rest of the parts.. still sounded shitty.. so now I've got stock cats and it sounds ****

 

Thanks for the comments - My aps TT kit will be here next week, so then we will be talking

The exhaust is what I think is the problem. My greddy has 2 resonators and 2 mufflers. I also have resonated test pipes (labree) so I have decent exhaust note control. I don't know what the borla non duals is like, but I run a borla on my 01 strat R/T with headers and test pipes and it is CRAZY loud with some good drone . That said, I don't think the catback is keeping the rasp under control, especially paired with a y-pipe.

Do you plan on getting a new catback, or sticking with the stock b-pipe back with the pro-1 y-pipe?

 

no I'm keeping the borla.. I like it.. It looks and sounds stock so it keeps the cops off.. and I can tell everyone I race it's stock I honestly don't think the true dual would give any better gain....btw- the b-pipe is not stock with this borla exhaust....Nothing is but the cats