[Ccass]

Doug's headers are also more expensive because they use 3/8" flanges, 16 guage tubing, 4 tube design and welded collectors. All features you won't find in cheap headers. I still say I'd rather go thru the potential nightmare once and be done with it than have to deal with leaking and warping after a year or two.

[Toy4Chris]

For my 67 Firebird, I'm getting ready to order headers soon. Motor is out, and just freshly painted. Almost all together. Should I install the headers before installing the motor? Right now, both frnders are off, as well as the passenger side inner fender.
Also, can anyone suggest header brand for my specific car?
Thanks
Chris

[disc0monkey]

Darrell did you really just say it was a PITA to put in headers on a A-body? I put my dougs on my 71 car so we have the same car. I thought it was easy. You really don't know what a PITA is, my buddy's 1200 dollar Stainless headers from SLP for his '01 WS6 were a PITA. We had to bang those things in, and forget about getting to the rear bolts! We needed towels to keep the blood from dripping down our arms! Are you sure you got the right headers for the right car

[rwh]

I put dougs on my 70 and found them quite easy to put on compared to any other header I had in the past. They are a very high quality header, well worth the price

[twooldgoats]

The Doug's headers fit perfectly on my '64 GTO racecar (with a stock frame). By raising the engine a few inches, I can even drop the passenger-side header in from the top! Even though I've had the engine out at least five times since I first got it running, I never dread the header install. It's a snap.

Jim

[Stovepipe]

Help, I need Help!, I called Thorley, classic industries, Summit Racing, Exhaust pros., even the beer gods, and no one knows why the Thorley's aren't working with my 69 firebird.
Summary: After Struggling with the stud that holds the counter shaft and screws on to the block and the clutch fork pin (WD-40 is my friend) I was able to get the headers on, which I would say it was no problem, but doing it by myself was harder than I thought. So now the Headers are on, but then I noticed that the counter shaft for my clutch was hitting the headers, so I can put it in neutral but my clutch stays down on the floor, to return the petal up, one of flanges on the Counter shaft has to clear the pipes. Has anyone ever run accross this problem, or am I just a moron that has put this part in the wrong way.
On a lighter note the pipes sound so sweet. I wish I could run them without mufflers. Hahaha. These puppies are Throaty!

Stock 400 Sm Engine Block
Stock Clutch parts
stock 1969 conv.Pontiac firebird body
Doug Thorley 14 gauge 3-pipe Headers for a 69 firebird
12 hours of Blood sweat and Beers!
But I didn't scratch the Headers putting them in. Any Answers?
Oh, and after hearing these Thorleys I'd have to say that Hookers are crap.

[disc0monkey]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Stover:
Help, I need Help!, I called Thorley, classic industries, Summit Racing, Exhaust pros., even the beer gods, and no one knows why the Thorley's aren't working with my 69 firebird.
Summary: After Struggling with the stud that holds the counter shaft and screws on to the block and the clutch fork pin (WD-40 is my friend) I was able to get the headers on, which I would say it was no problem, but doing it by myself was harder than I thought. So now the Headers are on, but then I noticed that the counter shaft for my clutch was hitting the headers, so I can put it in neutral but my clutch stays down on the floor, to return the petal up, one of flanges on the Counter shaft has to clear the pipes. Has anyone ever run accross this problem, or am I just a moron that has put this part in the wrong way.
On a lighter note the pipes sound so sweet. I wish I could run them without mufflers. Hahaha. These puppies are Throaty!

Stock 400 Sm Engine Block
Stock Clutch parts
stock 1969 conv.Pontiac firebird body
Doug Thorley 14 gauge 3-pipe Headers for a 69 firebird
12 hours of Blood sweat and Beers!
But I didn't scratch the Headers putting them in. Any Answers?
Oh, and after hearing these Thorleys I'd have to say that Hookers are crap. </div></BLOCKQUOTE>
First off i can't help you b/c i have a auto. second i think they are talking about Doug's headers which are different than doug thorley, but im sure someone can help you out, especially if you make a new topic about thorley headers.

Can't amagine dropping the engine by myself, hats off to you...glad you got to hear the thunder!

[Ron]

Doug's Headers installed easy and fit great in my '65 GTO.

[Ccass]

my guess is that you purchased 'Thorley' headers which are completely different patterns than "Doug's" headers. "Thorley' headers are not well regarded in the Pontiac community.

[Ron Landis]

What Cris said...Doug's headers are totally different animal. I bought a set from Milt Schornack in Michigan last year, so I know they are an older set. Flanges are super thick, all welds are beautiful and the headers themselves look like jewelry. I put Hooker Super Comps in our stock chassis '64 GTO and had to notch the A-frames. When I consulted Hooker's tech guy, he non-chalantly state.."oh, you sometimes need to do that on older cars." Dude... this is my suspension we're talking about, and it's not like you have't had 40 years to get it right. I won't even sell Dynomax to Pontiac people, as they do not fit a '64-'67 car or any 4-speed cars. There is a reason you can't get headers from the factory. Ram Air manifolds rule on a mild street engine, and they're no picnic!

[Darrell]

Here is a picture of the great fitting and easy to install Dougs headers,resting directly on the frame . I have brand spanking new motor and tranny mount, before you ask.

[Darrell]

Another. So Darb, next time you ask me whats taking me so long, just understand all I am doing is fixing everyones junk I keep buying!

[grandville455]

Damn Sorry buddy!Is anyone else having those issues that he is with their 70 gto with dougs?

p.s what is taking so long ,lol

[Ron]

You say you keep modifying everyones junk to fit. The parts and pieces you are purchasing are probably not junk but you are trying to fit them on a car that is tweaked.

[J_JAMNIK]

I bought some Flo Tech headers from Supershops when they went out of business for $50. They arent the best headers, but they have thick flanges and only had to dent in the steering gear box area since the tube rested on it. Engine torque finished the dent after installation. I have taken them off and put them on at least 5 times in a 3 year period and it is definately a "science". It is almost like memorizing the torque sequence for a ford 3.8 liter cylinder head I think it took 6 hours to do the first install, but had it down to 30 minutes per side the last time around. Hind sight being 20/20, I would have never bought any headers knowing that I would have to do the job this many times over the past 8 years!

[Darrell]

NO MY CAR IS NOT TWEEKED. I measured out the frame when I was restoring it. Is it so hard to believe that Dougs headers are not as good as everyone else is saying?

[meanolgoat]

Darrel- When I installed my Doug Headers on a 67 GTO, The Drivers Side was hitting the Cross-member. I called Dougs and told them what the problem was. I marked the area where the tube was hitting the cross-member and sent the header back to Dougs. They cut and re-welded the header, re-coated it and sent it back to me. fit perfect the second time, I still have the warrenty since they fixed the problem, and the coating was redone.

I would give dougs a call and send them the pictures you have. See if they are willing to fix the problem. It worked for me, but took a couple of weeks.

[Darrell]

Thats a good idea! I should do that. You may be a mean old goat, but you have some good ideas.

[Tom Hand]

Darrell,
We installed a set of Doug's on a 69 GTO and the tube hit the lower control arm mount, driver's side. We had to heat it and dent it in about 0.5". We called to let them know but unfortunately, they were not able to send a new set. It was only a little problem as this man bought them uncoated for just this reason (in case we had to dent them). After we dented it and he coated them, they went on and were okay. He too had all new mounts and a restored, correctly aligned frame. They thought his car was a bit different than their jig. I suppose that could be but it would have only taken a bit of a modification to their jig to have hit it 100% right on. I was sad but not mad as the man owning the car was prepared for just such an issue.
I hope you have as much luck fixing it as we did.
Tom

[68lemans462]

I'd be pissed off too...

It is so funny how people get defensive when you are clearly stating that there is a problem with your new HIGH DOLLAR headers! I'm sorry, but for all the crap people talk about these headers, and their price THEY SHOULD BOLT RIGHT UP!! Suggesting that your frame is tweaked, give me a f'in break...

As for the quality of the Doug's headers, I would say that they are second to none. They are obviously of higher quality than the Hooker Super comps I just put on my car. AND they dont hang down as low. With the SC's though, everything just bolted right up. No interference with anything, and my stock oil filter and housing fit fine. All the bolts were easy to get to, and I had both sides in after one night (5-10pm).

I have a friend that just purchased a set of Doug's for his '67 GTO. They appear to fit well. Of course, no one mentioned to him that he would need to move his disc brake proportioning valve in order for them to fit. What a major PITA! Of course, once he re-works his brake lines they will fit fine but thats alot of work.