shorty headers for VZ ls1

[v8-alg]

Hi,

i have a milltek exhaust system fitted to my ro including sports cats. The whole system bolts up to the standard headers, question is does anyone know where to get some shorty headers that fit and is it worth doing? i wont be spending much more on that side of things for a while just wondered if its good for a few extra ponies and a bit more noise.

cheers :-)

Alg

[Magic919]

Get long headers and new cats, join to Milltek.

[stigmundfreud]

Magic919 said:

Get long headers and new cats, join to Milltek.

do not do this, I repeat do not do this

unless that is you want to spend a fortune on replacement cats as you will need to do exactly that to get ground clearance even over a gnats errection. I had Miltek and Miltek cats, with long tubes added the cats were too big so ended up having to get new cats. Virtually no real power gain or noise to be had either. OP I'd stick with your stock headers and save yourself a ball ache.

[Magic919]

So it's fine with long tube headers and new cats then.

[stigmundfreud]

Magic919 said:

So it's fine with long tube headers and new cats then.

umm yes but its $$$$$ for no benefit. The OP has had the miltek cats added which are quite big (assuming they are the milteks)

[ringram]

Get someone's VXR headser that they dont want anymore. Quite a few go long tubes, so there will be some HSV shorties around. Talk the the guys at the indie shops.

[Magic919]

stigmundfreud said:

Magic919 said:

So it's fine with long tube headers and new cats then.

umm yes but its $$$$$ for no benefit. The OP has had the miltek cats added which are quite big (assuming they are the milteks)

Funny enough I'm familiar with the Milltek cats, having had the same system on a Monaro.

[MadMaxHSV]

I have a spare full '06 VXR system i'll be happy to split for the headers/cats...

[swordfishcoupe]

Or more to the point get some Wortec headers - fabulous things but very expensive IMHO. But a necessary evil on the VZ CV8 to get rid of the cast iron headers.

Cheers
Steven

[V88Dicky]

v8-alg said:

Hi,

i have a milltek exhaust system fitted to my ro including sports cats. The whole system bolts up to the standard headers, question is does anyone know where to get some shorty headers that fit and is it worth doing? i wont be spending much more on that side of things for a while just wondered if its good for a few extra ponies and a bit more noise.

cheers :-)

Alg

Hello mate, I have a set of these shorty's for sale, if your interested send me an e-mail.
www.hmheaders.com.au/index.php?q=204.html

They are unused and other than a couple of scratches, are in new condition.

[MyM8V8]

v8-alg said:

Hi,

i have a milltek exhaust system fitted to my ro including sports cats. The whole system bolts up to the standard headers, question is does anyone know where to get some shorty headers that fit and is it worth doing? i wont be spending much more on that side of things for a while just wondered if its good for a few extra ponies and a bit more noise.

cheers :-)

Alg

Unless you want a better exhaust tone, don't waste your money on long tubes, unless you will be going for a cam with overlap to take advantage of them. As far as I have found there is no massive power benefit in using LT headers over stock, using stock/cams with no overlap.

If you want headers shorties can be bought quite cheaply on ebay I believe. The advantage would only be aethetics/weight saving.

[Well_Fans]

V88Dicky said:

v8-alg said:

Hi,

i have a milltek exhaust system fitted to my ro including sports cats. The whole system bolts up to the standard headers, question is does anyone know where to get some shorty headers that fit and is it worth doing? i wont be spending much more on that side of things for a while just wondered if its good for a few extra ponies and a bit more noise.

cheers :-)

Alg

Hello mate, I have a set of these shorty's for sale, if your interested send me an e-mail.
www.hmheaders.com.au/index.php?q=204.html

They are unused and other than a couple of scratches, are in new condition.

" When purchasing this header the high flow connecting pipe with the catalytic converter, HM120SSCP for the 5.7 litre and the HM122SSCP for the 6.0 litre, will also need to be purchased as this header will not fit the existing engine connecting pipe." -from the link you provided, was tempted by them myself until I saw that - if you need to change/mod the cat pipes be as well going for the longtube headers with bigger primaries.

[v8-alg]

well thanks for the replies offers and as usual there is much to think about, it seems there is probably not much to be gained from this, might go for a set of used vxr headers if they are cheap enough, will the 6.0 ls2 headers fit does anyone know? and are they much better than the ones already on the cv8?

thanks

alg

[V88Dicky]

Well_Fans said:

V88Dicky said:

v8-alg said:

Hi,

i have a milltek exhaust system fitted to my ro including sports cats. The whole system bolts up to the standard headers, question is does anyone know where to get some shorty headers that fit and is it worth doing? i wont be spending much more on that side of things for a while just wondered if its good for a few extra ponies and a bit more noise.

cheers :-)

Alg

Hello mate, I have a set of these shorty's for sale, if your interested send me an e-mail.
www.hmheaders.com.au/index.php?q=204.html

They are unused and other than a couple of scratches, are in new condition.

" When purchasing this header the high flow connecting pipe with the catalytic converter, HM120SSCP for the 5.7 litre and the HM122SSCP for the 6.0 litre, will also need to be purchased as this header will not fit the existing engine connecting pipe." -from the link you provided, was tempted by them myself until I saw that - if you need to change/mod the cat pipes be as well going for the longtube headers with bigger primaries.

Yes that is a mod that would need to be done; the existing cat pipe will not fit over the 2 1/2" collector and would need a slight adjustment by a friendly exhaust fitter/ fabricator.

[monkfish1]

v8-alg said:

well thanks for the replies offers and as usual there is much to think about, it seems there is probably not much to be gained from this, might go for a set of used vxr headers if they are cheap enough, will the 6.0 ls2 headers fit does anyone know? and are they much better than the ones already on the cv8?

thanks

alg

As is often the case answers are being given here based on people different perception as to what is fiited astock to each model!

LS2 "headers" are just the stock LS1 cast iron manifolds. Only the earlier 2004 VXR (and earler HSV variants) had shorty headers. Long tube headers will give a useful gain, though mostly its midrange torque.

[007 VXR]

monkfish1 said:

v8-alg said:

well thanks for the replies offers and as usual there is much to think about, it seems there is probably not much to be gained from this, might go for a set of used vxr headers if they are cheap enough, will the 6.0 ls2 headers fit does anyone know? and are they much better than the ones already on the cv8?

thanks

alg

As is often the case answers are being given here based on people different perception as to what is fiited astock to each model!

LS2 "headers" are just the stock LS1 cast iron manifolds. Only the earlier 2004 VXR (and earler HSV variants) had shorty headers. Long tube headers will give a useful gain, though mostly its midrange torque.

and sound great
ive had vxr 04 shorty headers on my 06vxr for about 4months till i did it right and had the long headers fitted .. much better

[monaro5.7]

Just get them made fou u

[V88Dicky]

monaro5.7 said:

Just get them made fou u

Hi Si, are you getting cats with your headers from AAS? Did they mention anything about not being able to fit anything other than OEM cats because of some law that came in last August?