Please tell me the best fit small block headers.

ir3333 said
...could you feel 15 - 20 hp?

Yes, more so on lower powered engines. Feels like the difference between a crap running car and one with a really good tune up and then some, but just some. Not a ton.

crackedback said
Owned cars and installed both Dougs and tti.

Save money by Dougs. If you can get them using the autozone 20% off deal, makes a coated set around 500 US.

Best advice right there.

Leadfoot said
Are you racing? On the street and depending on the size of the engine the impact on anything under 4500 RPM give or take is virtually zilch.

You have done something wrong!

Locomotion said
If headers don't help below 4,500 rpm, your carb tune-up is way off of the headers are too big!

Or something more serious!

stroked340 said
Yup..threw the manifolds and the thermobogs right in the trash!!

Well, at least you got half of it right....:banghead: :glasses7: