Doug's Headers Mated To TTI Exhaust Question

[MoparViking70]

Hi Everybody,
I recently purchased some ceramic coated Doug's headers for my '70 Road Runner and am planning on mating them to the TTI X-pipe exhaust system - likely with the Dynomax Superturbo mufflers they supply.
As I plan on using my friend's shop to do the engine swap and set up the exhaust system as best I can, I want to get out of his way as soon as possible. I'm trying to show up as ready as I can in a month or so when the engine arrives.
Any advise out there for what I might need in terms of adapters to mate the exhaust system to the headers? Any help is appreciated. Thanks guys!

 

[dieseldazzle]

What dougs part number? Some have 3.5 collector (2 inch primary) some have 3 inch.

 

[PurpleBeeper]

To stay out of his way as much as possible, I suggest you run the car up there with open headers. Putting the headers on is BY FAR the most time consuming step. After headers are installed & the tailpipes/mufflers are on there, the rest of the job is just bending/welding up a couple short pieces of pipe to mate the headers to the x-pipe & exhaust.

IF you need his lift to put on the headers, maybe you can pre-install the mufflers & tailpipes and coat-hanger the front of the exhaust off the ground.

 

[Gpuller]

What dougs part number? Some have 3.5 collector (2 inch primary) some have 3 inch.

Right the 452's are 2" with 3.5" collector.

 

[Wookie316]

Dougs headers are shorter than TTI's. What I mean is the collector flange is not as far back as the TTI because of the design. Also the 452 flange is parallel to the frame rail where a TTI header collector tends to turn into the center of the body a bit. A TTI X pipe can be made to fit a Doug's 452 as I have done it on my own car. I would suggest getting headers fitted and not worrying about the exhaust until you see what your dealing with. The 452 is a very nice header.

 

[65Fury440]

I just bought 452s and and am going to a TTI system.
It would be interesting to see where the Doug's come out in relation to the TTIs

 

[MoparViking70]

What dougs part number? Some have 3.5 collector (2 inch primary) some have 3 inch.[/Q

Right the 452's are 2" with 3.5" collector.

Yeah, that's the size I have.

 

[MoparViking70]

I just bought 452s and and am going to a TTI system.
It would be interesting to see where the Doug's come out in relation to the TTIs

I'm sure I just have to get into it but I'll take some pics when I do in case it helps anyone.

 

[MoparViking70]

Dougs headers are shorter than TTI's. What I mean is the collector flange is not as far back as the TTI because of the design. Also the 452 flange is parallel to the frame rail where a TTI header collector tends to turn into the center of the body a bit. A TTI X pipe can be made to fit a Doug's 452 as I have done it on my own car. I would suggest getting headers fitted and not worrying about the exhaust until you see what your dealing with. The 452 is a very nice header.

Thanks very much for the advise. This gives me an idea of what to expect.

 

[65Fury440]

When I talked to a TTI dealer, they asked what kinda headers. I think there may be a universal bend kit on the header side. C body is a lil diff than B though.