Art Brock

The 302 in my car has the cast iron Ford Hi Performance manifolds on it (going to a dual 2.5" exhaust).

Would I gain much by switching to a set of headers?
I wont change them out if the gain is very small.
If you can recommend a specific brand I would appreciate it. I want something that fits without having to mod anything. (I have a C4 auto & may go with an AOD when the C4 gives out).

My car is a weekly driver (more often in good weather) & I want to eventually make 300-350 HP with it. Will be going to better breathing AFR heads one day so that may be a factor in the decision.

What do you guys think?

Scott H.

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ky

depends on what headers. longtubes make more low end power and shortys make high rpm power. i have tri-y's. they didnt make any power gains on my motor but it made it sound better.

Art Brock

Motor is a stock 1993 Cobra short block that was purchased rebuilt from Ford last year (by the PO).
Soit shouldhave stock 1993 5.0 Cobra internals. That would be 9:1 compression, GT-40 heads (I'm not sure they really are GT-40 heads but I won't go into that now). Edelbrock F4B intake with a 600 Vac Sec Holley. C-4, with shift kit, rear is 3.0 gears. Not sure what convertor is, but probably whatever was stock on a 1966 car.

Scott H.

.....

ky

i have gt tips with the 3 hole vents. does it really effect it much? i dont think so. if it did, there would be no noticable difference whatsoever. and if it was easier on the enigne, you might get a extra 50 miles outta it till it dies way down the road.

Scott H.

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ky

no my engine is at my work being built. theres not enough back pressure for the louvers to do anything anyway. its 2.5 inch exhaust.