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Old 05-04-2025, 08:38 PM
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Default Small Block Chevy Header to head bolts

Looking for recommendation on header to head securing bolts. I've always used the same 7/16 hex head bolts with a small flange. Curious if there are better alternatives. Thanks!
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Old 05-04-2025, 09:27 PM
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ARP reduced head bolts that use a 3/8” wrench are just amazing and will make you hate those ancient 7/16” header bolts! They come in SS or black oxide.
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Old 05-04-2025, 10:36 PM
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Is there a market for those old 7/16 header bolts?
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Old 05-05-2025, 12:31 AM
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I have a couple small cans of header bolts around here. I did prefer the 3/8" hex bolts. They are different lengths too and the longer ones held the torque set better, but they ALL need re-tightening 3-4 times after heat cycles. No memory if they came with header sets, or I bought them aftermarket.
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Old 05-05-2025, 12:51 AM
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Drill the heads for safety wire so they don't loosen.
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Old 05-05-2025, 01:43 AM
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I use ARP stainless steel bolts with 3/8 head. There are also socket head bolts that work better in some applications.
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Old 05-05-2025, 04:17 AM
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I use Allen headed bolts. Been using them for years with no problems....Joe
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Old 05-06-2025, 12:58 AM
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ARP now makes a 5/16 head.
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Old 05-06-2025, 01:37 PM
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Quote:
Originally Posted by JohnF View Post
ARP now makes a 5/16 head.
That is what I use on my Stock Eliminator.
Once I tighten them, they do not come loose.
And I use Remflex gaskets. I've never had a leak.
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Old 05-06-2025, 01:41 PM
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Quote:
Originally Posted by Thomas View Post
That is what I use on my Stock Eliminator.
Once I tighten them, they do not come loose.
And I use Remflex gaskets. I've never had a leak.
I am waiting on the 3/8 bolts and have the Remflex gaskets ready to install. Thanks!
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