im shure its been asked before but how many ponies are a set of headers worth on a 1966 440 with non hp manifolds, ch4b intake ande 260/272 cam. just wndering if i would see any improvemt.

merry xmas

seems the going rate is 15-25 ponies.

Yes you will see a gain in HP amd MPG.

My 440 was had a true 9.5:1 CR and was rated at 350 HP.

With nothing more than a mild cam and set of small headers it was putting out an easy 400 according to my dragstrip times.

Stock intake, heads, valves, bore, pistons, etc.

Yes the cheap headers with a true 2.5" dual exhaust and cheapie turbo mufflers should be the standard for a decent 440 engine. If you have the money than by all means check into Thorley or TTI but the $129 summit cheapos will be fine.

Summit was out of their house brand for weeks a few years back. They subbed Walker Dynomax headers and they fit/worked REALLY well. I was impressed with the quality, fit and the way the tucked up under the car.

Shhh! Dont say TTIs are expensive. Other members will flame you calling you poor and unfit to own a mopar for not being able to cough up $800.

TTI's are overpriced. I'll take a $170 set of Hedmans with $300 of Jet-Hot ceramic coating anyday.

NEVER had a leak with hedmans in 16 years of 440 e-body applications.

You can usually find a set of used headers reasonable.I have picked up a couple sets of 1 7/8 hookers in decent shape.
For a stock/mild motor the cheapo 1 3/4 will work fine and be an improvement over manifolds with a good 2.5 exhaust system and some decent flowing mufflers.You may need to rejet the carb a little richer to see all of the gains.

Big block mopar dudes have an advantage over small block mopar dudes. In the small block world we all want headers that DO NOT run any of the tubes way under the car. (ground clearnce issues!) So in order to get the headers that dont do this you must step up to Thorleys, Dougs or TTI. All expensive (TTI being ridiculous) With big blocks even the $99 headers route the tubes allowing ground clearance. What if an offshore manufacturer were to make a "SIMILAR" header to TTI for like $200.................

thanks for the info. looks like its a worthwhile investment to get some more hp