Mystery Z28

I'm definitely ordering the QTP LT Headers. What I'm confused about is which y-pipe to get. I was thinking if my car doesn't need to be emissions tested for another couple of years (I'm assuming) since my car is new, that I would just get the off-road y-pipe and when I have to be tested for emissions, I'll have to order a y with cats.

What are my options?? I mean I definitely want QTP LTs, but is there an aftermarket y with cats that would fit my setup and pass the sniffer????

If it isn't going to pass the sniffer than whats the point???

Will I have to worry about cops???

stik6shift00

off road pipe~!!! im doing it...get emission cheater from pep boys

Mystery Z28

Thanks, anyone else...?

stik6shift98

just make sure you arent gettin any trouble codes.....i have offroad pipes

2002 NBM Bird

QTP is offering a Y with RT cats in it.......They flow really well and will help you pass emissions.......I don't think you'll lose too much in HP, but you will lose some drone noise

Thats the setup I am going with once Uncle Sam sends me my money

stik6shift98

u have obd2 which means u dont get the sniffer they hook your car up to the computer and see if it gives it any codes so you wouldnt need cats.....unless they do a spot check.....but your car is 2002 anyway so you have a while until emissions

stik6shift93

Hey mysteryz28, where in illinois are you from? There's a bunch of us around the naperville area that get together all the time. If you live around we should meet up sometime.

Mystery Z28

Licolnwood Illinois...its a burb right next to Skokie and Niles.

Man I sure as hell am confused...Some guy just e-mailed me telling me not to get the off-road y-pipe because it will make my GMMG catback sound raspy...

stik6shift98

it wont make it sound that raspy.....sure a lil yes...ask anyone its hardly noticeable

afterimage ss

on some exhausts it's noticeable... dunno about GMMG though

2000LS1Z28

I was that guy(I PM'ed you on LS1.com). It's your car, so do what you want. But I'm telling you, your GMMG exhaust will get VERY raspy in the mid rpm's and sound a lot more unrefined throughout the whole rev-range without cats. Not quite as bad as a Borla or LM, but it is still very noticeable. Trust me, I've heard em' all.

FYI, any "single" exhaust set-up without cats will sound raspy on an LS1. Some systems just sound worse than others this way. With cats, it's a non-issue. I don't see what's so confusing about it?

Mike

2002 M6 Z28

stik6shift93

I will say if you to go with one of the "mufflerless" exhausts, the GmmG is a little less raspy than the loudmouth.

Mystery Z28

Well how much more do you think the QTP ORY with cats going to cost???The regular ory costs $310...

2000LS1Z28

I honestly don't know Jonathan. Catylitic y-pipes are quite a bit more expensive than catless y-pipes though. Last I heard, QTP didn't even have a Y w/cats(although that was a while ago).

Are you only stuck on the QTP's? They are very good headers, but for instance JetHot has a GP right now for COATED longtubes that are $511 shipped to your door(awesome price). You could then purchase some good Carsound highflow cats(94009) for $65 each and have them welded into a 2.5 or 3" custom Y-pipe that you would have to have made. I called FLP down in Naperville and they said they'd make a quality 3" custom Y w/cats welded in for $350 straight-up. So add up the total cost which = $1,000 flat for some good LT's, Carsound cats, and a 3" custom Y-pipe. Very good price IMO for that set-up compared to the other LT's that come with cats which are like $200-$300 more on average. But again, I don't know much about the QTP's or their pricing. Either way, the extra money spent for cats will be worth it.

You can still go without cats if you want to save some $$$, but you'll probably hate the sound. And you'll have to deal with emissions too.

Jack D Ripper

Check this new info about a cat y pipe from QTP.
http://www.ls1tech.com/ubb/ultimateb...;f=24;t=006590