How Much HP with factory headers ?

[GN280CI]

How Much HP or best time with factory headers ?

 

[86 TR]

Ive heard of people with cleaned up headers running down into the 10's with them. I have stock headers that have been port matched and have run low 11's so far.

Hopefully going to improve those numbers when I get my new turbo.

 

[blackgn1]

I know someone who made over 700 hp on stock headers.

 

[SS_Sean]

Grumpy ran has run in the high 9's with them...

 

[Grumpy]

9.94 @ 138.. full weight car 3660.. puttin out a little power

 

[turbofabricator]

9.94 @ 138.. full weight car 3660.. puttin out a little power

Ya, but we all know you are cheating!!! You have a GIRL driving it! That's just not fair!

Yep, stock headers are good to 10.0. Faster than that, there is a probable gain with a better header. Like the Chinese ones on E-bay.

 

[Mr. Insurance]

I have seen several cars that have run in the 10's with stock or slightly modified headers. It really comes down to properly tuning and driving the car.

 

[GN280CI]

ok thank you for your reply !

 

[Ross L]

my question is... I've read where the factory headers can run into the 9's and 10's but,,,,(there's always a BUTT ) how much of a restriction are they? If car (A) runs 11.5 with stock headers and car (B) runs 9's how much would they pick up with a set of nice headers? Would they be worth 2-3 tenths?
Ross