tti headers

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If you want headers for clearance. I suggest the Dougs. They sit higher and less pain with clearance to steering parts. I have TTI and they hit in spots 700 dollar headers are not suppose to.
 
For that level of power 1 7/8 may be a bit big. I would suggest the stepped TTI 1 5/8 to 1 3/4 if you select TTI. They support your power level and The smaller size are easier to first. Doug's very nice also.
 
I just ordered the "TTI 340" for my magnum. Full coating and shipped $840.00
 
I agree with Rocket that TTI's 1 5/8"-1 3/4" step header will be much better for your application. They work well in a pretty wide range of power levels. I have them on my Dart Sport running mid-low 11's weighing 3,540+ lbs. I never had it on a dyno, but I'm sure it's well over 400 HP. 360, 750 carb, LA-X heads (unported w/original sized valves), 10.5 compression, 904 trans & footbraking.

The fit in my car was excellent. Room to remove & install a mini-starter, no oil filter adapeter, plenty of ground clearance & no dings. One can move things around a bit by shimming engine and/or trans mounts if necessary. One just has to remember that 40+ year old cars can vary in production quality especially after that many years of abuse, possible accidents and replacement of suspension parts, mounts, etc. that can vary a bit also!

I've never messed with a 4-speed so I'm not familiar with any fitment issues that may arise there with any headers. But even with that, performance-wise, it's always better to select a size a little on the conservative side than a little too big!
 
I have them on my car I absolutely love them and they fit Luke a glove I had both sides on and bolted tight in 45 minutes. No fitment issues at all
 
I was only looking at 1-7/8 cause that's what was recommended on mopar's website for my motor. I just didn't know on size or what headers. I've been looking at dougs cause the autozone deal. Tti cause they make a 1-7/8.
 
I have the 1 5/8-1 3/4 step headers and they fit pretty well. One thing you may run into is having to buy TTI's Z-bar. I had to. Otherwise it rubs on the tubes. Use a straight filter adapter with the short filter.
 
moparmike98 said:
I was only looking at 1-7/8 cause that's what was recommended on mopar's website for my motor. I just didn't know on size or what headers. I've been looking at dougs cause the autozone deal. Tti cause they make a 1-7/8.
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A long as I've seen the TTI/Dougs comparison/debate, I finally looked the Doug's up. It appears that they are 1 5/8" all the way! The 1 3/4" step on the TTI's do make them more versatile than straight, essentially a 1 3/4" header. Properly spaced/sized, the step helps scavenging/flow and are used on a variety of race headers. I've heard of Stock eliminator 350 Chevies actually start out around 1 1/2", but stepping up 2 more times! Straight 1 5/8" pipes could be considered a restriction for street/strip or race applications. My opinion is that 1 5/8" would be a restriction and 1 7/8" would be too big. I had custom 1 7/8" headers on my 360 W-2 bracket Challenger weighing 2,800 lbs and running as fast as 10.22 @ 131in the '80's & '90's. But I didn't even consider going bigger.
 
Tested both, at 400hp, the step isn't worth the extra 300 bucks. Even at 500ish HP, not worth the $ difference.

1 7/8 is not what I would run on a mid range hp engine like that.

Save money, buy dougs and spend the $300 you saved on a something else.

Dougs or tti will likely require some z-bar modifications.
 
Call TTi. I bought mine for my 408. I called them and they asked me all kinds of questions. What block, what horsepower, what heads, what starter, etc.... I am running just over 500 horsepower and wanted to go 1 7/8 as well, but they talked me out of it because I don't have the horsepower to need 1 7/8 and if I used them it would cost me low end torque. I went with ceramic coated thermal 1 5/8 step headers. I love them. They work well, look like fairly new after three years, and I can access my spark plugs.
 
FWIW, here is a dyno comparison of everything from OEM cast iron manifolds to straight 1 3/4" headers. from a Hot Rod magazine article. Done on a 300hp 360, the gains over straight 1 5/8" headers would be even greater an an engine with more HP. Since they are better pretty much throughout the entire operating range, even small numbers will improve acceleration. Peak isn't as important as "area under the curve".

I don't know if they optimized jetting for each change, but it should be considered anytime anything is done to change anything related to the air going into or out of an engine. (I.E.: air filter, spacers, cam, headers, exhaust system size/style, etc.

Obviously it's up to you to make the final determination as to what is worth how much to you. The variety of opinions on stuff like this are helpful either way. I have to admit that I am a little biased because the value of little gains is higher for me because of my class. I don't know if you would gain a tenth of a second on your car with TTI's over Doug's and you may not be able to feel it in the seat of your pants. But it would be worth it to me. Also, any future improvements to your car will be more beneficial if you weren't limited to 1 5/8" straight tubes.

At least crackedback and I agree that 1 7/8" is too big. :thumbrig:



155_0307_exh_dyno_z.jpg
 
I would also like to note that I installed TTi's when I put my motor in three years ago, and have never had an exhaust leak. I've put on a little more than 20,000 miles. The gaskets are all original and hold very well. I have friends who fight continual leaks at the manifold on their Mopars. Not me.
 
Dougs run VERY different from the POS hooker 1 5/8" headers.

On a 475hp 360, the difference was 5hp between dougs and tti. The range up to 4K rpm was practically identical, then tti started to make a little more power. If a buyer feels the 5hp is worth an extra $300, have at it.
 
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First thing is those numbers are so small its a wash depending on the weather conditions, second thing is the hooker headers are not even a tuned header but the dougs are, apples and oranges. I don't have a problem with ttis but when they are not even close to the dougs in pricing its hard for me to justify 5 hp.
 
crackedback said:
Dougs run VERY different from the POS hooker 1 5/8" headers.

On a 475hp 360, the difference was 5hp between dougs and tti. The range up to 4K rpm was practically identical, then tti started to make a little more power. If a buyer feels the 5hp is worth an extra $300, have at it.
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Since I posted almost the same dam thing I could say great minds think alike but I know mine isn't.:D
 
moparmike98 said:
What are the best 1-3/4 headers
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For Power and decent ground clearance TTI. For best fitment, ground clearance and less hassle and still good power over anything other than TTI, Dougs. but the power difference is 5 hp only and that's a free flowing TTI header that you have yet to hammer on if need be
 
moparmike98 said:
What are the best 1-3/4 headers
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Problem with straight 1 3/4" headers is they are mainly Hooker or Hedmans. Hooker have a tube that goes below the K frame. Hedmans require cutting inner fenders for a tube.

If you MUST have a 1 3/4" tube, which at 400hp is not useful, then buy tti steps and at least get a decent fit.

The difference in price and minimal HP just doesn't make sense to me to spend the extra for tti over Dougs.
 
Dougs and Pypes 2 1/2 stainless race pro exhaust for abought the same as the tti headers alone.

Jeff
 
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