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Old 12-01-2006, 01:37 PM   #1
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Default Greddy bolts?

I tried searching about the size of the bolts on this site and going to home depot trying to match up all the bolts that came with the kit. But I had no luck finding the bolts. Can someone give me the quantity and the size of the bolts I need to upgrade to grade 8?Thanks in advance

Last edited by 06evoix; 12-01-2006 at 05:50 PM.
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Old 12-01-2006, 05:48 PM   #2
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Come on! someone must have upgraded their bolts.
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Old 12-01-2006, 05:59 PM   #3
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https://www.miataturbo.net/forums/showthread.php?t=614

I got some from McMaster and just cut them to the right lengths, so I cannot vouch for the sizes.
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Old 12-01-2006, 06:11 PM   #4
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4 M8x25 for turbo to mani

3 M8x35 for DP
1 M8x30 for DP


I purchased from AAA Metric Supply 303-892-9000

Grade 10.9
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Old 12-01-2006, 06:26 PM   #5
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Thanks og and kevin02
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Old 12-02-2006, 02:33 AM   #6
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There are three dimensions to studs.
Two sides are threaded and are in our applications, not the same length.
My Begi Manifold has the stud holes drilled all the way through it so I might be able to get away both sides the same length.

On the mcmaster website, I searched "M8x1.25 stud" There are about 50 different studs of varying short and long side lengths, and overall length.

I think the studs that came with my begi are something 1cm short / 2cm long / 3.2 overall... or close enough. When I took off my turbo to do the clutch and replace the oil drain flange gasket, two of the studs came out of the manifold on the nut... nothing to do but Dremel them off. I'm going to order a dozen studs when I get my replacements for future turbo removals... which means my Dyno day is pushed back until those studs come in.
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Old 01-08-2007, 02:50 PM   #7
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I just called NAPA. They seem to have M8x1.25 bolts. Is that the same thread pitch as M8x25? Or am I missing something?
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