LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Best Gasket for headers , copper?

Old Sep 25, 2003 | 01:49 PM
  #1  
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Best Gasket for headers , copper?

OK i have Jet Hot lt's and put on copper gaskets i read somewhere that i should have heated them up first or someting.

Well anyways what is the best gasket to use? and the best prosses to install them?

THANKS MAN!
Old Sep 25, 2003 | 02:47 PM
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I used Percey's aluminum gaskets and they have worked great for me. However, I used ARP bolts so I had to retighten them 4 or 5 times during the first few weeks. No leaks and no loose bolts. I did use copper for the collecters and they seem to be ok. If I do it again I will buy the Percey ones for the collectors too.
Old Sep 25, 2003 | 03:01 PM
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Fel Pro FFP 1406 w/a bit sealant.JMHO
Old Sep 25, 2003 | 03:08 PM
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Another vote for Percy's. The felpro's sucked IMO.
Old Sep 25, 2003 | 04:37 PM
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Another vote for the Percy's. Go with Stage 8 bolts too.
Old Sep 25, 2003 | 04:51 PM
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Thumbs up

Originally posted by Hellion
Another vote for the Percy's. Go with Stage 8 bolts too.
Exactly. You won't need the retainers but the stage 8 bolts make it easier to tighten them down. The whole setup is well worth the extra money IMO. If you get them good and tight there will be no need to retighten the bolts.
Old Sep 26, 2003 | 08:49 AM
  #7  
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?

How did u get to the last bolt on the pasnger side (with stage 8)? allen wrengh?
Old Sep 26, 2003 | 09:05 AM
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I've done a lot of header installs on 4th-gens and always have good luck using the 1406 Felpros and ARP header bolts. The people having problems are the ones not going through a few heat cycles and retightening.

FWIW, I'm using the 1406+ARP combo with my LTs (for the past 5+ years)
Old Sep 26, 2003 | 09:12 AM
  #9  
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Re: ?

Originally posted by 97formula1234
How did u get to the last bolt on the pasnger side (with stage 8)? allen wrengh?
I use a 1/4" ratchet and a swivel head socket to get that one.
Old Sep 26, 2003 | 09:30 AM
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Originally posted by WayneE
I've done a lot of header installs on 4th-gens and always have good luck using the 1406 Felpros and ARP header bolts. The people having problems are the ones not going through a few heat cycles and retightening.

FWIW, I'm using the 1406+ARP combo with my LTs (for the past 5+ years)
what he said.

ARP's and Fel-pro's here. Make sure you retighten them often for the first week or so. The first day I would probably check them every tie I got out of the car.

Mine don't move at all anymore, although I check them every month or so for piece of mind.
Old Sep 26, 2003 | 09:39 AM
  #11  
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Thumbs up

Fel-Pro 1406
Old Sep 26, 2003 | 09:43 AM
  #12  
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Another vote for Percy's.
I used 2"cap screws with 1" brass spacers for the header bolts.
Looks good and I can easily tighten all of them.
Old Sep 26, 2003 | 09:49 AM
  #13  
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Originally posted by KGRESOCK
Another vote for Percy's.
I used 2"cap screws with 1" brass spacers for the header bolts.
Looks good and I can easily tighten all of them.
where did you get these? what brands?
Old Sep 26, 2003 | 09:50 AM
  #14  
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I had a leak develop with the Fel-Pros and switched to using Earl's gaskets an have been leak free ever since ~2yrs.

-Tony
Old Sep 26, 2003 | 10:07 AM
  #15  
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Originally posted by madhatter
where did you get these? what brands?
Got the cap screws (stainless) at a hardware store.
And the brass sleeves at Sears hardware.
I did hardend bolts and steel sleeves last
year. Worked fine but looked like crap by the end
of the season.
PM me your email and I can send a pic tonight
if interested.
Kevin

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