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Which head bolts??

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Old 05-15-2014, 08:03 AM
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Default Which head bolts??
Be searched and couldn't find a good answer so sorry if this has been beat to death. I'm got a 1999 z28 I'm about to swap my ported 799's over and noticed two different head bolts for the ls1. I have a 1999 car but I bought a GM crate ls1 back around 2011-2012 and had put in. So would I use the post 2004 head bolts or the pre 04? Thanks in advance
,Derek
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Old 05-15-2014, 10:39 AM
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if the motor was brand new from gm in 2011 it should use the 04-up style
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Old 05-15-2014, 10:45 AM
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Originally Posted by redbird555
if the motor was brand new from gm in 2011 it should use the 04-up style
ok that's what I was thinking, thanks for the fast reply.
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Old 05-15-2014, 11:34 AM
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Wouldn't hurt to have a set of each available to you if possible. Then return the ones you don't need.
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Old 05-15-2014, 11:37 AM
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Originally Posted by thunderstruck507
Wouldn't hurt to have a set of each available to you if possible. Then return the ones you don't need.
what is the difference in the two? Length,pitch,or something else?
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Old 05-15-2014, 11:52 AM
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Originally Posted by derekatnip45
what is the difference in the two? Length,pitch,or something else?
Some of the large head bolts for the 04+ blocks are shorter. Your block uses the 04+ bolts.
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