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Hi, I know this is a newbie quesiton, but oh well, I'm a newbie. My question is this: I have a 66 289 with dual exhaust and I was wondering a couple things. First of all, my car is allready somewhat loud with the two chamber flowmasters installed, and its right at the edge of being too loud, but right now its just right. Anyways, I was wonderign if I put headers on my car, would they make it sound LOUDER? or how would it change the sound of my car? My second quesiton is how much would it cost to have them proffesionally installed? thank you very much for you answers. See you on the road!
 
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They will not change the exhaust sound from the rear much at all.
You will get more noise from the engine compartment. The heavy cast iron walls of the stock manifolds dampen the exhaust note. The thin pipe of a header does not have this ability to dampen the sound

Greg B
 

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Everything else the same, headers will be louder than cast iron manifolds. Some headers of thicker stock will be quieter. Note that those thicker headers command a commensurately higher price, not only because of the tubing used, but also generally thicker, more precise flanges, as well as other quality issues. When I went from hipo manifolds to tri-ys, I can't say I saw much in a commanding improvement in performance, but i did see a significant increase in decibels.

Tom Kubler, Long-time Mustang Enthusiast & San Antonio Mustang Club Founder
 
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Beside the mufflers and headers, I find the weight of your right foot has quite a bearing on the amount of noise that come out the back ;-)

http://www.hotkey.net.au/~amcruisers/images/stangsc.jpg
 
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right now i got some thin cheap ones and i love the way it sounds right under u going through the big 3 inch collector. id say its a go but thats just my opinion. but once u start getting on it im sure the mufflers will be louder than the headers anyways.
 

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There is no escaping it, if all things are equal except you make more power, they will make more noise at the rear. Most recent experience: Installed set of JBA's on my son's '91 GT, and it makes it just noticeably louder at the rear.

Russ

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The cost of having them installed will be somewhere around $200. You can call your local muffler shops and tell them what you want done. They should be able to give you a price over the phone.
I installed tri-y's in mine... I drove it to the muffler shop, then had the shop cut the exhaust pipe - we pushed it back out into the parking lot where I installed my headers. It took me about an hour and the only trouble I had was needing to borrow a jack to lift the engine a couple of inches for the drivers side clearance.
We pushed it back in and they welded up the collectors. All done for about $50 labor.


You're just jealous because the voices only talk to me!!!
 
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First of....we dont' call it "noise"...its "music" :)

Maybe a little louder, but a totally differnt sound, depending onthe header. "tuned" headers are typically quieter and dont' have as much of the "pop" or "rumble" sound to them.

I dont' know what kind are on my Cleveland, but that [email protected]#m thing sounds mean...gives me one of those grins that hurt :)

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1970 Fastback, 4V 351C, various colors with black interior
 
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