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-   -   How it's done: Headers? (https://ls1tech.com/forums/generation-iii-external-engine/1045568-how-its-done-headers.html)

00Antivenom Jan 9, 2009 02:46 AM

How it's done: Headers?
 
So I know the quickest way to horsepower is making your engine breathe; intake, rollers, cam, exhaust, etc. I'm finally getting into modding my car and I've been looking into headers a lot lately. What I'm wondering is how most of you install your headers and keep legal with cats because I'm not finding any longtubes that allow cats, and I hear short tubes are pretty much useless. Otherwise, is it advised to just remove my cats? I understand I might have to go to an exhaust shop to get all this done. And if I do get longtubes and manage to keep cats, would it be possible or advised to stick with stock cats or go to higher flowing cats?

BlueMagicSS Jan 9, 2009 03:08 AM

If you put long tubes on you wont pass emissions.... I'm not sure of any state that is legal for long tubes... you can keep cats with lt's though... You would have to buy a catted y-pipe which is more expensive so most people don't buy them... but they would have high flow cats on them.... me I have ORY... In the "Great" State of California almost anything you do to your car is illegal... if not they'll find a way to make it illegal....

ZMONSTER! Jan 9, 2009 03:22 AM

Highflow cats like magnaflow, or maybe these thunderbolt cats I hear about, but not alot of info on them.
Oh and the cats go in the Y pipe, not on the headers so you can put them wherever you want.

Pushead Jan 9, 2009 08:52 AM

Most companies that make longtube headers have the option of buying catted Y pipes. In my part of Ohio, cats are required. I bought a set of American Racing Headers with their catted Y pipe. They didn't do a sniffer test, just a visual inspection to see if there were cats.

00Antivenom Jan 9, 2009 09:05 AM

What does ory mean? I see it everywhere. And thanks for the help guys.

LS1crazy01 Jan 9, 2009 09:13 AM


Originally Posted by 00Antivenom (Post 10813093)
What does ory mean? I see it everywhere. And thanks for the help guys.

Its the factory syle Y pipe.

aNuBiS Jan 9, 2009 09:17 AM

No, ORY means Off Road Y-pipe (so basically a race style/catless y-pipe)

00Antivenom Jan 9, 2009 09:29 AM

So do many people here use long tubes on the road? If I just want a street racing car/daily driver, what setup do you guys suggest?

streetassasin Jan 9, 2009 09:33 AM

almost everyone on here runs longtubes with no cats

massls1guy Jan 9, 2009 10:22 AM

A lot of people run LTs with cats (well I do anyway - LOL). The cats can make the LTs sound better, less rasp. Exhaust doesn't stink. Cops won't bother you. My 2 cents.

OnyxY2KSS Jan 9, 2009 10:26 AM


Originally Posted by BlueMagicSS (Post 10812376)
If you put long tubes on you wont pass emissions...

:huh: in crazy California maybe!

Ericbigmac83 Jan 9, 2009 10:35 AM


Originally Posted by streetassasin (Post 10813232)
almost everyone on here runs longtubes with no cats

Yup, pretty much. And lots of us have dumped exhaust too

01ssreda4 Jan 9, 2009 10:48 AM

mine is LTs with full three inch true duals, no cats and dumped before the rear. its ignorant loud and i love it. :drive: cops dont mess with you as long as you arent being an ass and the guy at the close by inspection place is a cool cat.:cool:

00Antivenom Jan 9, 2009 11:10 AM


Originally Posted by massls1guy (Post 10813527)
A lot of people run LTs with cats (well I do anyway - LOL). The cats can make the LTs sound better, less rasp. Exhaust doesn't stink. Cops won't bother you. My 2 cents.

What's a good header setup for the dollar? I'm getting a check at the end of the month to beef up my car with so I'm kind of on a budget. I copied the sux2bu ram air setup last night and sealed off my intake in the front, I have the airbox and bellows, and right now my exhaust is cut off right after the axle. I'm probably going for intake, cam, loudmouth, headers and y-pipe/cats, 3.73s and maybe some new rims. So I'm trying to squeeze every cent I can.

Paul 1953 Jan 9, 2009 11:19 AM

Here in Washington, emissions test standards vary BY COUNTY where you register your car. In my county there is no emissions check. So LTs & ORY legal. But in Seattle there is an emissions check. It seems to depend on population density. So check your county laws.

Here's my experience with my LT mods & power gains:
http://s142.photobucket.com/albums/r...ent=Kooks4.flv

massls1guy Jan 9, 2009 12:16 PM


Originally Posted by 00Antivenom (Post 10813801)
What's a good header setup for the dollar? I'm getting a check at the end of the month to beef up my car with so I'm kind of on a budget. I copied the sux2bu ram air setup last night and sealed off my intake in the front, I have the airbox and bellows, and right now my exhaust is cut off right after the axle. I'm probably going for intake, cam, loudmouth, headers and y-pipe/cats, 3.73s and maybe some new rims. So I'm trying to squeeze every cent I can.

I think pacesetters are probably the least expensive header option, here they are at Texas-Speed:
http://www.texas-speed.com/shop/item...id=181&catid=8

If I was you I would avoid the loud mouth with headers. Any cat back with a real muffler is fine for headers.

1969mach1 Jan 9, 2009 01:01 PM

Here.... $379.99
Pacesetter Long Tube Headers with TSP Off Road Y-Pipe and all the hardware you will need to install them
http://www.texas-speed.com/shop/item...id=976&catid=8

Tainted Jan 9, 2009 01:05 PM

FACT: Anytime you *MOVE* you cats from their stock position or remove them you *could* fail an emissions test visually.

BlueMagicSS Jan 9, 2009 01:10 PM


Originally Posted by OnyxY2KSS (Post 10813548)
:huh: in crazy California maybe!

Oh well I guess I'm wrong.... In the "GREAT" State of California LT's are illegal... so might as well run them with no cats... If you're gonna get in trouble why not get in trouble right??? haha!!! I only Joke...:angel:

Twisted636 Jan 9, 2009 01:12 PM

heres my question how do yall feel about these http://cgi.ebay.com/ebaymotors/98-99...Q5fAccessories

and will the slp headers really make the 40hp or what ever they clam?


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