Originally Posted by roger
Some yrs. ago, A Car mag. started building a 64 F;lane 289 & adding the hooker long tubes showed an increase on the dyno of 90hp, with no other mods!
Yea, i know, was hooker the sponsor or what!
You can certainly feel the difference for sure, but 90hp, not sure about that
In the same article they mentioned they saw no measureable increase in power going from stock ex.manifolds to the Hi-po's, i find that hard to believe too.
If you go with the Hookers, do install good plugs cause its a bear to change them once the headers are installed
Roger you are only telling half the story..That engine was highly modified with aftermarket heads etc..Running the stock exhaust manifolds was a MAJOR cork..Once they switched to headers they got a huge power increase as the engine could finally breathe and run to it's full potential..Just adding headers to a stock engine will give you no where near 90hp...
Having said that I am a big fan of long tube headers and dual exhaust on a ford..It will give you an increase in power and probably gas mileage as well....Any other mods you do afterwards (intake,carb,camshaft) will work that much better with the headers already in place.