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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

How long of header bolts, 1 inch or 3/4?

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Old 06-07-2009, 01:22 AM
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Default How long of header bolts, 1 inch or 3/4?
How long do they need to be for use with the pacesetter headers?
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Old 06-07-2009, 02:27 AM
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1"x3/8ths
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Old 06-07-2009, 09:51 AM
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1inch will be nice. they wont want to back out as much. i have 3/4 on mine and a few of them like to loosen up every month. im thinking of switching to a longer bolt
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Old 06-07-2009, 09:55 AM
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1" here as well. Then again, with the uber thick flange of the LPPs, you can't use anything BUT 1" bolts. Even with my MACs and then Jet Hots, I stuck with 1" bolts.
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Old 06-07-2009, 09:58 AM
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Not sure of the thickness of those flanges, but I have Hookers and use a 3/4" ARP and have zero problems w/ them backing out.
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Old 06-07-2009, 10:03 AM
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Another thing to consider is that on occasion, depending on header design, it may be more difficult to get a longer bolt into the flange due to placement of the primary and tube diameter. Just something to consider.
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Old 06-07-2009, 11:03 AM
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what length of bolt do the pacesetters come with?
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Old 06-07-2009, 09:21 PM
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mine came with 1" , i used 1" arp bolts worked nice
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Old 06-07-2009, 09:48 PM
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1" here as well. I'm using PS LT's.
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Old 06-07-2009, 11:50 PM
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1'' here also on my PS Lt's. Did the initial install last summer and to this day i have not yet had to tighten a single bolt on them.
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Old 06-08-2009, 12:03 AM
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i used the 1" that came with my hookers. They were all still tight when i removed them after 5000 miles
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Old 06-08-2009, 12:06 AM
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thanks guys, I just ordered some 1 inch with the 3/8 hex head. I figured it would be easier to get the wrench on with the smaller head
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Old 06-08-2009, 12:11 AM
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Originally Posted by mvvette97
thanks guys, I just ordered some 1 inch with the 3/8 hex head. I figured it would be easier to get the wrench on with the smaller head

You will still probably have to shave down a 3/8's box end wrench a bit to get in there properly. I know mine was pretty tight and i had to shave a bit off of the wrench.
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Old 06-08-2009, 12:15 AM
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that's no problem, I have many other tools that have had some modification done to them in the past for other projects.
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Old 06-08-2009, 12:59 AM
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im using stainless steel allen bolts and have no problems getting to them.
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