Header Checklist
Thread Starter
Melting Slicks
Joined: Jun 2004
Posts: 3,032
Likes: 4
Header Checklist
for starters - this is for my '85, with the stock iron head L98 (i.e. oval exhaust port). I tried a search, but most of the info I found was for the later aluminum heads with Dports (113's I believe they are?).
I was hoping someone could give me some suggestions about what parts to use and where to get them at, for my headers. (LT headers, ceremic coated in and out).
I've got copper gaskets, with a ridge at the exhaust port openings, but I'm not sure if they are the right style to be using. Any suggestions?
And what about the header bolts? Should I just reuse the stock ones? Any recommonded replacements?
Thanks for any input
I was hoping someone could give me some suggestions about what parts to use and where to get them at, for my headers. (LT headers, ceremic coated in and out).
I've got copper gaskets, with a ridge at the exhaust port openings, but I'm not sure if they are the right style to be using. Any suggestions?
And what about the header bolts? Should I just reuse the stock ones? Any recommonded replacements?
Thanks for any input
Race Director
Joined: Feb 2003
Posts: 16,475
Likes: 270
From: Kingman AZ
Cruise-In VII Veteran
Cruise-In VIII
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16
Try calling Summit www.summitracing.com They have folks there that can answer these questions. I can't help other than saying that there are header bolts out there that have the ability to lock so your headers don't loosen up. There are also header bolts made for tight spaces so you can get at them easier.
Team Owner
Joined: Sep 2001
Posts: 62,067
Likes: 1,722
From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
I'm going to use Felpro 1406 gaskets, several people here used them with no problem on their iron-headed cars.
You will probably need some new bolts, not all of them, but some, so may as well get a new set. I'm probably going to buy a set myself.
You will probably need some new bolts, not all of them, but some, so may as well get a new set. I'm probably going to buy a set myself.
Le Mans Master
Joined: Jan 2002
Posts: 9,036
Likes: 13
From: Edmonton AB
I can recommend the 3/8 x 1" Stage 8 DDH (p/n 8911A).
These are plated 6pt caps screws with a 3/16 Allen
socket in the heads. They are also available in 12pt,
(no Allen socket) as well as in $tainless $teel.
I also bought ARP 3/8 x 1" 12pt SS (p/n 400-1210).
These are nice but I was only able to find 1". So
I used the Stg 8 as they offer a 2-pk of 3/8 x 1-1/4"
bolts and I expected to use these for the A/C & Alt brackets.
I think as long as the copper gaskets don't hang into
the ports, these should provide superior life and be
reusable. The FelPro 1406 (Brodix D-port application)
works for my L98. Whether it would seal properly on
your flange/port is not known.
Incidently, I'd suggest using a die grinder or round file
to lightly debur and laterally elongate each of the bolt
holes before installation. Might not be necessary, but
won't hurt either. If it saves having to pull them back
down or cross-threading something, this will be time
well spent.
.
These are plated 6pt caps screws with a 3/16 Allen
socket in the heads. They are also available in 12pt,
(no Allen socket) as well as in $tainless $teel.
I also bought ARP 3/8 x 1" 12pt SS (p/n 400-1210).
These are nice but I was only able to find 1". So
I used the Stg 8 as they offer a 2-pk of 3/8 x 1-1/4"
bolts and I expected to use these for the A/C & Alt brackets.
I think as long as the copper gaskets don't hang into
the ports, these should provide superior life and be
reusable. The FelPro 1406 (Brodix D-port application)
works for my L98. Whether it would seal properly on
your flange/port is not known.
Incidently, I'd suggest using a die grinder or round file
to lightly debur and laterally elongate each of the bolt
holes before installation. Might not be necessary, but
won't hurt either. If it saves having to pull them back
down or cross-threading something, this will be time
well spent.
.
Large Impressive Member
Joined: Jul 2003
Posts: 65,811
Likes: 71
From: Good health is merely the slowest possible rate at which one can die
St. Jude Donor '04-'05-'06-'07
Originally Posted by 1991camaro
oval port 
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