what size header bolts? can i use the 1 inch bolts
03-20-2008, 11:47 PM
#4
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Join Date: Jul 2006
Posts: 290
On my heads (LT4) I had to blind tap the holes to get 1" bolts all the way in. They were just barely running out of thread otherwise. The holes were plenty deep, but not threaded all the way. I guess others may be different?
*edit* should also mention the header flanges were 5/16". A 3/8 flange may have worked fine, but it would have been really close.
*edit* should also mention the header flanges were 5/16". A 3/8 flange may have worked fine, but it would have been really close.
Last edited by jasonface; 03-20-2008 at 11:50 PM.
03-21-2008, 08:17 AM
#6
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Location: Lansing, MI via Bowling Green, KY: Dalton, GA: Nashville, TN & Atlanta, GA
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I used 1" Breslin bolts with my headers. Considering the thickness of the flange and gasket, I wouldn't have felt comfortable with 3/4" bolts.
03-21-2008, 09:26 AM
#7
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Join Date: Mar 2005
Location: Aurora, IL
Posts: 12,312
Exactly, the flanges are thick. I originally used 3/4 ARPs, they didn't feel like they had enough bite as they ran out of thread pretty quickly.
03-21-2008, 09:34 AM
#8
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Join Date: Jan 2008
Location: Cypress, TX
Posts: 466
used for the FLP's. I'm running 1" on the Kooks, which have a pretty
thick flange. I ran 1" 'socket head' bolts (versus hex-head), and for me,
these are the only way to go - makes tightening the bolts way easier:
http://picasaweb.google.com/calder.c...32328402025650
.
03-21-2008, 02:42 PM
#9
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Join Date: Jul 2006
Posts: 290
I used ARP 1" SS, 12 point, reduced head (5/16") bolts. They look great, and the 5/16" head makes it easy....well, easier to get the wrenches on 'em. Technically, NOTHING is EASY when you're talking about headers on these cars
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