Panther427

So i was thinking you could use this type of head for the rear

http://www.summitracing.com/parts/HE...0/?image=large

Then use a Ported Vette or F-body Manifold or one like this on the front of the motor.
http://www.summitracing.com/parts/HE...0/?image=large.
Then weld in a Y pipe connect the crossover to the outlet of the rear header.

Bryan921SS

That would be cool, but then you still have a whole extra set of headers/manifolds because you have to buy them in pairs....get a pipe bender, a good welder and start bending up some nice 4 into one exhaust mani's.... Why wont someone do this for us....Damn W-Body following

ttranssam

iTrader: (10)

man....look if manifolds fit, then headers gotta...does someone have pics of the room and a bottom shot? i just got fired but i get to still use there shop, i am kinda looking for work...

neilownz

the 8.1l ones are for big block engines

Panther427

Thats why i sujested using ported F-body/Vette exhaust manifolds up front, and then 2 different guys could buy the rear manifold and split the cost and each take one manifold.

Panther427

They were mostly referance photos. I have seen some just like that for the LS4.8-6.0 engines.

neilownz

http://www.sandersonheaders.com/prod...roducts_id=173

Something like these.

mixerda

these on the rear.....



that's a possible when compared to out stock mani



only prob I see is that still gotta have the cross over come in and meet up with the DP at some point and in this tiny *** spot getting you hand in there to bolt everything together is not gonna be fun at all



the collector on rear mani might make contact with the fire wall also...be kinda close I might take a look into it at some point with my exhaust guy and see what he thinks is possible

Mgpeagle

iTrader: (6)

Could you take a pic of the manifold exhaust port holes for me? Or do you have any you can share? Thanks in advance.

-Mike

ttranssam

iTrader: (10)

mixerda, that should work. but the front header can look like this...
http://cgi.ebay.com/ebaymotors/98-99...Q5fAccessories
but cut the flange to wrap over the trans, and y them together at almost the bottom. **** if i had that header in my shop i would be able to do it with 2 180 bends and two 21/2 bends...
so yoy guys dont have any header options???

Panther427

Thats correct. No one want to make them due to low production numbers. We have only 1 exhaust system option(magnaflow), 2 1/2 Cold air kits(K&N, CAI, and FWI) Very limited on mass produced parts. I think this would be easy to do with a shop lol.

1 CLEAN SUP3R SPORT

^^^if u go thru a shop your talkin over a grand for sum headers,man it would b nice though...

MCSS07

IVe been in contact with a guy at Milzymotorsports.com and they are willing to make headers for the LS4 cars. They just need a group of people to bring the cost down from 1000 to 800.

neilownz

Not this again

AlabamaGuy

iTrader: (5)

From what reading I've done, these cars are severely limited by the Intake Manifold. Why don't we put our time and energy into that instead of a set of headers?

Panther427

Because headers are easier. Intakes require alot of effort no matter what u do. Id be will but no money

98GTcoupe

If you take a look at the GTO headers 04-06 shorty style, they look the best in my opinion. I contact Hogan performance about this topic, an they bascially said they will never do it. SUCKS! Could someone get them to fit? I bet, make a custom crossover an collector merge it all into the DP. I think it could work tho.

Greg

Bryan921SS

Parts like Headers, Intake Manifolds, Cams, etc wont ever be made in large numbers(or at all) for the LS4.

This is a low production small block V8....if you guys want more power save your money and harden your transmission and turbo your car.

This is a FWD transverse mount engine application...just like the small Japanese engined cars, the only way to get a good amount of cost effective horsepower out of this type of drive train layout you have to force more air into the little lady with a turbo.

Turbo + Inter cooler + Transmission work = around 8 - 10 thousand dollars...so save up your money and go that route.




Personally these cars are fun DD's...that's what they were made for...if you want something to tinker with and make fast get an F-Body or a GTO.....06 BOM GTO is the next car on my list.

Or a new Camaro once they hit the used market.

ttranssam

iTrader: (10)

i dunno i may be retarded or some **** but it just looks friggen easy??? and why dont a ls6-1 intake work on the cars???

Panther427

https://ls1tech.com/forums/ls4-front...ng-closer.html


This is were we are at with a LS6 or any other RWD manifold. It can be done just takes time, tools, and money


And as too why not get a -fbody or something else, I cant afford to newer cars, I need a four door front or awd car for the family. I like to MAKE things work. Like rossko has said to me, its just like our fathers and grand fathers had to do. They didnt have anything but 3 window coupes and flathead fords, nail head buicks. They took what they had, figured out a way and made it work.There is nothing some Inginuity and hard work wouldn't fix with this motor. Hell i have even been looking at stroking the motor. To me the biggest issue is trying to force all 8 cyl's volume into the rear manifold. If u could just get a f-body or vette manifold for the rear then join up the crossover at the exit of the rear manifold. That would be the cheapest and easiest route in which to improve back preasure and scavaging or the exhaust ports.