Rear exit manifolds for flathead 39 Ford

[JSeery]

Originally Posted by JayChicago

I have a lot to learn. Why to do you scoff at Drakes statement? Doesn't dual exhaust improve delivered horsepower?

Dyno tests show minimal hp gains with exhaust modifications on semi-stock engines. The Drake statement is "...the single most effective way to increase horsepower...". That is a false statement. I like headers on a flathead, I like the look, I like the sound, but it is NOT the single most effective way to increase horsepower, not even close.