Hedman Side Exhaust Headers
Racer
Joined: Oct 2005
Posts: 353
Likes: 0
From: Citrus Heights Kaliforneenya
Race Director
Joined: Jan 2002
Posts: 15,323
Likes: 2,684
From: Close to DC
C2 of the Year Finalist - Modified 2020
I put a set on my SB about 15 years ago, no existing troubles. I did have to put a torque strap on the motor since the driver side collector flange was super close to the frame. 
Dennis
Dennis
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Safety Car
Joined: Nov 2004
Posts: 4,182
Likes: 94
From: going faster miles an hour...with the radio on in browns mills new jersey
Burning Brakes
Joined: Dec 2004
Posts: 800
Likes: 3
From: Idaho
I've had hedmans on my car for 20 yrs with no problems, however the 13/4" primaries are a little small for the 502. I'm using them now but wish they made a set with 17/8" or 2" with the proper flange to work better with the heads on the 502. I do recommend that you do have them coated. Mine were done by JetHot and have held up well.
Good luck
Russ
Good luck
Russ
Intermediate
Joined: Dec 2006
Posts: 26
Likes: 0
From: Manvel Texas
Russ,
Am putting 502 in my 66. Does the factory side pipes bolt right up to the headmans or is there other mods that must be done? What has to be done to the mounting flange to make them work properly? Any advice would be appreciated as I have not purchased them yet.
Thanks in advance,
Sting1
Am putting 502 in my 66. Does the factory side pipes bolt right up to the headmans or is there other mods that must be done? What has to be done to the mounting flange to make them work properly? Any advice would be appreciated as I have not purchased them yet.
Thanks in advance,
Sting1
Burning Brakes
Joined: Dec 2004
Posts: 800
Likes: 3
From: Idaho
Sting 1, you need a reducer from the collector to your side pipe. Jegs or Summit sell these. You will need a 3" to the size of your side pipe. Cut your side pipe and weld in the reducer so it bolts up to the collector. Fire up your engine and go and have some fun
Russ
ps. You may need to grind the header flange to create clearance for a few head bolts at the rear of the head. You'll see what I mean when you try to bolt the header to the head. No big deal, just a small modification.
Russ
ps. You may need to grind the header flange to create clearance for a few head bolts at the rear of the head. You'll see what I mean when you try to bolt the header to the head. No big deal, just a small modification.
Last edited by Russ T Gate; Mar 12, 2007 at 01:29 PM.
Racer
Joined: Jul 2006
Posts: 254
Likes: 0
From: Thornton Colorado
Sting,
Do you already have your 502? I'm shopping for the best price on a ZZ502 for my 65 coupe. Have you seen threads or information on a 502 install?
I'm subscribing to this thread because I also have factory side exhaust and want to keep the look.
Do you already have your 502? I'm shopping for the best price on a ZZ502 for my 65 coupe. Have you seen threads or information on a 502 install?
I'm subscribing to this thread because I also have factory side exhaust and want to keep the look.
