500" going in the 70 Challenger soon.
(INDY EZ heads, solid cam, etc )
10.6:1 pump gas
mostly street use,,,,,,,,,,so clearance could be a issue and don't want to much hassle installing and working with them...
What size header would you guys use,,,, ?
thanks
Doug

Doug,
My vote would be for either the 2" TTI's or Doug's 452's. http://www.manciniracing.com/dougsheaders2.html

Hi Kevin,,,thanks,,,I was initially leaning toward the 2" TTI's,,,but wondering if it's going to have clearance issues with everything,,eg torsion bars,,etc ( put a bigger bar in it for street duty ) ??
I think the car would like the 2" better for breathing,,,
The link for the Doug's 452 headers looks nice,,,have you used them much before ?? Did you like them,,? better than TTI ?

I run 2" stepped tti's on my sr headed 511 six pack roadrunner. The headers fit very well, only thing I would buy for a mopar.

I run TTI 2" on my RB 452 Challenger with Stage VI / Victor exhaust ports. Clearance is good, torsion bars shouldn't be an issue, but the starter is pretty much trapped behind the driver's side header.

Sounds like the vote so far is for 2"
( I have them on my 65 Belvedere w/no issues,,,but this is my first E body ),,,so not sure what i am in for,,,,,
Was going to run a mini-starter,,hopefully this will help..

I vote 2" also, especially since it's not an A-body and the motor is 500".
I even wonder how the TTI 2-2 1/8 step headers would fit your car?

If you go the TTI route, I have found removing the drivers side torsion bar makes the job go much faster and easier installing the starter. Once you remove the torsion bar grease up the end that goes in the lower control arm and the next time you should be able to pull it out by hand, no special tools needed.

Thanks Bob and Jim. Good thought on the torsion bar.

real happy with the Dougs 452 fit on my 68 Satellite . Easy plug change too

Tex

The step header is designed for a raised port head (SR/440-1) when used on a raised block. They will not work with a std ex port head like the EZ/RPM/Stealth etc....on a 440. They will fit a lowdeck with a raised port head, though.

In this case the obvious choice is the 2in TTI's. That's what I have been using on mine with the EZ's and previously the RPM's with an RB block. The e-body & b-body engine bays are basicly the same dimensionally.


Ron

I'm about to finally assemble my 446 with ez heads. The headers that I've had in my parts hoard are 2" primary's with 3.5" collectors Dougs D452 un-coated that I've read nothing but good things about here. They look like a real quality piece. But I haven't had header issues. The headers on my 383 are hedmans I got for $150 and never even painted them before installing on the 383 and it's been driven lots through the 15 years and are still good. I expect the Dougs to be at least that good lol.

I used TTI 2" headers in a 72 Challenger I used to own. It had a 505 rb w stealth heads.
Perfect fit and excellent quality, and easy install. Well worth the money. Plus you can get the whole system that will bolt right up to the collectors w smooth mandrel bends. I went with the 3" x pipe and ultra flo muffs.

Doug, on the Challenger I had I went with the 2" TTI and also their complete 3" exhaust system complete with new tips and the fit was great. A little pricey but they were nice.

Another vote for Doug's here. I never used the TTI's though. I have two sets of Doug's. They have nice thick flanges, and are heavier than the standard headers I've used in the past. Look on Amazon before buying. I found an uncoated, new set there for $375!! Not sure if it was a mis-print, but they sent them at that price. I had them Jet Hot Coated after fitting them to the car. Good luck.

That's my system, including TTI's 3" Challenger tips.

Thanks everyone for the replies !! Very helpful info,,,
Motor is almost done then to the dyno and hopefully in the car soon.
Dwayne at Porter did the heads, intake and picked the cam.
Will keep ya'll posted on the headers.
Thx again !
Doug.

FWIW, I thought the Doug's and the TTIs were basically the same before today. However, when I compared pics of both together, it's pretty obvious that the Doug's is designed even more for fit, rather than performance, than the TTI. The primary tube lengths must vary from as short as 20" to closer to 40".

I know the TTI 2" ranges from about 25" to 41", but averages out to approx 32". Neither are ideal, but the Doug's looks even more compromised. I like the way both are made, but wish I could still use my old Hooker 2" Super Comps with raised-port heads; IMO they are a better design strictly from a performance perspective.

On my 493 I use EZ heads and its 10.6 comp. I run the 2" TTI's and their full 3" exh system. I like them alot as they fit great in my 63 and have given me zero problems. Ron

I have 2-1/8" Hooked Super Comps on my 528". I think they are choking it down a little but it is what I had for now. Mine still made 840 H.P. with them and 10.5:1 on pump gas.