[Adecco]

Was on the Doug's Headers website and could not find a set for my 62 Catalina 421 car....do the make them or does mad-dog headers make a set. Thanks Tom

[tom s]

They are no diff than 389 headers?Did you find them?Tom

[Adecco]

Got it thanks. ..

[Jeffs64Cat]

Can't find them for mine anywhere I look?

Did he stop making them for before 1965?

[tom s]

I just went to his site,they make 61-64 $650.Tom

[Jeffs64Cat]

Got a link? I can't seem to find them. Unless I'm not at the correct site

[tom s]

link
http://maddogheaders.net/products/pontiac

[RAM YAK II]

My MAD DOG headers bolted on my '62 really nicely. When I bought them I was told they would.

[Jeffs64Cat]

Thanks for the link. As I thought I was at the wrong site.

Ram Yak II I'm hoping they doing the same for me in my 64 Cat.

[tom s]

Unless the car is going to be a serious race car there is no way I would run headers over the long branch on a street car.FWIW,Tom

[aceaceca]

I was just going to say exactly what Tom S above said. My 62 Cat ran no faster with 4 tube headers versus long branch with a foot or so extension on them. As a general rule, I would never again run tube headers on a street car. Spend the money on a set of reproduction long branches and you will be much happier in the long and short term. My 62 would run 14.26 quarters time and time again. Probably due the skilled driver.

[Jeffs64Cat]

Now where do I look for them.

My car is only is only going to be a mildly wild street car. So always thought headers were the way to go.

It's exhausting now through the stock mans and when they put a new exhaust system on it only has 2" pipes and the bend at the bottom is a sharp 90 degree.

It's got to be restricted bad.

[tom s]

Ames sells them along with Ram Air restorations.Same as gen one firebirds except for the oil filter adapter I believe.Our big car take the thicker adapter.Tom

[Engine-Ear]

Those Maddog headers are beautiful!

+1 on the LBHOs for a street car unless the look or sound of headers is a goal.

[b-man]

Originally Posted by Jeffs64Cat

Now where do I look for them.

My car is only is only going to be a mildly wild street car. So always thought headers were the way to go.

It's exhausting now through the stock mans and when they put a new exhaust system on it only has 2" pipes and the bend at the bottom is a sharp 90 degree.

It's got to be restricted bad.

The reproduction long branch manifolds being sold now (with the exception of '62 -'63 Super Duty) are made to fit '65 -'70 big Pontiacs and '67 -'69 Firebirds.

That makes me think that they're a no-go for a '64 chassis.

If that's true then you have only two choices for manifolds. One being the HO manifolds used on cars equipped with the 421 HO engines, rare and expensive and not reproduced.

The other choice that's far more affordable would be keeping your current stock exhaust manifolds, but you're not restricted to using 2" exhaust pipes. A 2-1/4" pipe fits and seals perfectly, just use a short section of this and flare the end of it to mate up with a 2-1/2" mandrel bent 90 degree pipe and then run the rest of the exhaust with 2-1/2" pipe.

You'd be surprised at how well a mild performance engine responds to a nice free-flowing exhaust even when still equipped with the standard log exhaust manifolds.

Some log manifold tech you might find interesting:http://forums.maxperformanceinc.com/...d.php?t=630943

[hurryinhoosier62]

Originally Posted by b-man

The reproduction long branch manifolds being sold now (with the exception of '62 -'63 Super Duty) are made to fit '65 -'70 big Pontiacs and '67 -'69 Firebirds.

That makes me think that they're a no-go for a '64 chassis.

If that's true then you have only two choices for manifolds. One being the HO manifolds used on cars equipped with the 421 HO engines, rare and expensive and not reproduced.

The other choice that's far more affordable would be keeping your current stock exhaust manifolds, but you're not restricted to using 2" exhaust pipes. A 2-1/4" pipe fits and seals perfectly, just use a short section of this and flare the end of it to mate up with a 2-1/2" mandrel bent 90 degree pipe and then run the rest of the exhaust with 2-1/2" pipe.

You'd be surprised at how well a mild performance engine responds to a nice free-flowing exhaust even when still equipped with the standard log exhaust manifolds.

Some log manifold tech you might find interesting:http://forums.maxperformanceinc.com/...d.php?t=630943

Bart, you might want to double check your info. According to RARE's website, the LB-1 long branch manifolds fit the '60-'70 "B" body chassis.

[tom s]

Bart,I have them on my 62 GP.Tom

[b-man]

I see, I guess I was going by my old H-O Racing parts book. They didn't mention fitment back to 1960, but if it's true then Jeff's only about $600 away from a 15 or 20 HP gain.

[Engine-Ear]

Great pic, Bart! This is getting saved and the idea applied to my Bonneville. ...I just went thru the linked thread. GREAT info there.

Not taking undue credit here, but I successfully fit a pair of the '65+ LBHOs on my '62 GP in 1996...the engine was a '66 389 & starter, with new OEM motor mounts, '62 bell housing and clutch linkage behind it. Paul at R.A.R.E. hadn't had anyone report success prior to this.

Then in '06 I did the same thing to the gold '62 Cat beater- it had an all-'62 driveline & starter and sagged-out original motor mounts. THAT required a little more finesse but that car is still on the road WITH that exhaust system.

[real61ss]

As Tom said, I have the longbranch manifolds on my 61 Ventura, fit great. At first glance they resemble SD manifolds.