headers difference

[tod1d]

stock headers are the same regardless if its supercharged or not? as in the s/c engine uses the same headers as the n/a engine

 

[Explicit_Spade]

That is correct as far as I know.

I have one set of each and they look to be completly identical.

 

[dsmuts]

Stock gp's don't have headers they have exhaust mainfolds

 

[brandonl2000]

they do in fact be the same. and the stock manis hardly flow well enough for the s/c engines at that.

 

[AjL227]

Yes, all 3800 Series II and III exhaust manifolds are all the same.

Actually, the stock manifold is considered to be a header, because of its tubular log style.
That is why, in California you are allowed to put on aftermarket headers that comply to the EPA.
Of course, I do not know of any that comply anyway, so it doesn't matter.

 

[tod1d]

how much of a difference would sd headers make on a na motor with hv3, er rockers, cai?

 

[matt5112]

less wheel spin, more pull above 4000 rpm.

Tires might chirp a little then hook and away you go.

If you have half decent tires, which I didn't at the time, then you might just hook right away.

 

[Grimsin]

if you do all that you should get a tune. I did a 91 octane tune and its a huge difference i cant wait till i get a HV3 and PLOG, just got my 2.5'' downpipe(ppl say get 3'' but it was CHEAP) today but wont install it till i got all 3 parts, once I get all 3 parts installed im gonna get a quick retune and should have a nice peppy car untill turbo.