My dad is trying to finish up his swap and he's trying to use some Hooker shorty style headers for a 4th gen LS1. Does anyone know if there is a y-pipe that will work with this or is it going to have to be a custom piece? The LS1 swap sticky says "Not 4th gen headers will work", but I thought that manifolds were the same dimensions as shorty style headers. Am I incorrect here? I always thought that shorty headers would work in a 3rd gen because they're basically like manifolds.

We're just trying to figure out what to do here, and not sure if anyone makes a y pipe that will work with manifolds/shorties in a 3rd gen. Thanks for the help!

 

I was under the impression that shorty headers didn't net any appreciable gains over regular manifolds so people haven't messed too much with them?

 

my friend was selling me his edelbrock 50 state legal shorty headers.. i didnt bother though.. they were ceramic coated and they would match up to the stock flange collectors of any ls1 fbody.

you'll most likely have to get someone to fabricate you a ypipe.
my car is still sporting a weak 2.25 piping up front! weaak

 

Just drop down two sections of pipe off them and run a flowmaster merge pipe. If you guys were closer I'd knock one out in an evening no problem I'd imagine.

 

shorties should work, its the mids and long tubes that wont due to the kmember.

 

I'm pretty sure shortys will work. Wasn't there a company offering mid length third gen headers??

 

http://www.brphotrods.com/mm5/mercha...gory_Code=CNV3

 

I know shorty's are not as good as LT's but for budget and appearance, what do you guys think about these?

http://cgi.ebay.com/ebaymotors/LS1-L...item255edade50

 

Edelbrock "direct replacement" shorty headers for LS1 firebirds/camaros will in fact fit. I used them on my swap since they were cheap.

 

I like the look of the shortys over manifolds fosho!! Ive gotta get some kind of exhaust and I dont have quite enought for longtubes and I dont want any loe clearance issues.

 

I was thinking about using the same set in my LS swap. I wonder if anyone tried these without any problems. I know they are not a huge gain in HP if any over stock manifolds, but they will sure look nicer then a set of rusty manifolds under the hood.

 

Those Racing Innovation shorties sure look great and are really cheap too, but from the pics it looks like they might hit the firewall. I´ve been comparing them with pics of the 2001-02 F-body GM pieces.
Would be great if anyone knew that these ones actually would fit our third gens.
180$ for brand new stainless shorties is a great price!

 

Anyone tried the Edelbrock shorties #65172?
Looks really good, both regarding fitment and looks I think
http://cgi.ebay.com/ebaymotors/Edelb...item2eb262d675

 

i thought the same thing

 

they are pretty close in power between shorties and the later fbody manifolds. however, if you're someone who's swapping in a truck motor and don't have the correct fbody manifolds, it may not be a huge difference in price between the two options. I went with a set of manis from an 02 camaro, but managed to snag em locally for under $50

 

Yeah if I could manage to find some 01-02 Fbody manifolds for 50$ (350 Swedish crowns)here in Sweden I would definately go for that. But I havent been able to find ANY Fbody manifolds yet. And the exhaust is soon the next step for my build...
I find it a bit strange that no one seems to have tried the edebrock ones yet in a third gen. They are just over 400$ with ceramic coating and look soo good.
It really sux about the Racing innovations shorties, they really seems like hitting the firewall. But who knows...and at 180$ sheeezz.

 

What about this:

Will the Hooker 4th gen y pipe work on a 3rd gen with the 4th gen shorty style headers? Is it absolutely necessary to get a custom y or will a rear aftermarket 4th gen one work?

 

Doubtful since the cars are different underneath

 

4th gen frame rails are spread out much further and straighter back as well, no way around a custom y-pipe IMO. In fact I wish thirdgens had a similar frame arrangement, sure would make running exhaust much much easier.

 

Maybe it's time to come up with a 3rd gen retrofit front subframe kit. Something that takes those narrowing frame rails out and sets them either straight back or outward. This would need to be done with a tranny crossmember and subframe connector kit incorporated, with some sort of bracing over or across the tunnel. If you really went nuts you could make it to mount the 4th gen K-member.

Benefits would be better exhaust routing and improved frame stiffness.

 

There is a car that had that done on here. They cut the front end off at the firewall and detached the frame rails, then welded on a whole 4th gen front inner clip, and frame rails onto the floor pan mating it to the 3rd gen fender rails (allowing the 3rd gen body panels to be retained.

The everything 4th gen fit just like stock as far as I remember. LSA suspension, K member, Rack, etc. Good idea if you can weld well and have a donor to use.

 

Everytime I'm under the car I look at those frame rails and wonder if the subframes and 6 point would "hold the shape" enough to hack all that off and make the rails run parallel back. I'd be removing maybe the last 10" or so of the subframe and boxing it. I have the welder and the time, just not sure it's something that would twist the body up and cause issues later down the road. But it sure is tempting!


well posted about it in the drag racing section, curious to hear everyone's opinion.

 

shorty lsx headers work in a 3rd gen swap!?!? man only if they had 1 7/8" ones

 

It would be great if someone with shorties installed in a third gen could post some pictures of their enginebay.
Any new thoughts regarding the racing innovation ones from you third gen LSX guys out here?Originally Posted by 88FormulaKiller
I know shorty's are not as good as LT's but for budget and appearance, what do you guys think about these?

http://cgi.ebay.com/ebaymotors/LS1-L...item255edade50

http://cgi.ebay.com/ebaymotors/LS1-L...item255edade50

 

DSCF0059.jpg?t=1295287765
DSCF0062.jpg?t=1295287770

 

Thanx alot for the pics of the installed headers. Are those the #65172 edelbrocks or #65732? I can see that yours have egr and air ports in them. And I´m pretty sure that at least the 65172 ones doesnt.
I managed to find a junkyard here in Sweden that has 2002 Fbody stock manifolds for sale.....they want 600$ for them, used stuff 600$!!!
So I´m trying to find a solution for this exhaust problem as fast as I can now, but I´m NOT interested in paying 600$ for used cast iron manifolds ;-)

 

#65732 is the part number you want to look for. They are usually listed under something like "direct replacement" for 1998-02 camaro/firebird. The only thing I don't like about them is that they use the silly stock GM flange gaskets, which are a funny triangle shape and not the classic 3 bolt affair.

But they are truly a direct replacement and can be used in any application where log style manifolds fit.

 

The 65732 direct replacement have EGR and AIR port on them which is something that I don´t need for my LS2 engine I think that the 65172 ones look just about the same regarding measurements but without any extra ports welded on. But they might stick out too far "away" from the engine. I´m trying to find some measurements between them.
Another option are the Pontiac G8 LS3 cast manifolds. They look really compatible from the pics at least. Anyone that have tried them or heard anything about them?

 

fatal88 is the one that did that. got to see it done in person.