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Stock Flywheel Hole Diameter?

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Old 09-22-2008, 08:03 PM
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Default Stock Flywheel Hole Diameter?

OK, I need to know the diameter of a stock GM flywheel bolt hole. Fidanza rates theirs at .468". I'm trying to find out if the GM flywheel bolt holes are bigger.

thanks!
Old 09-23-2008, 09:47 AM
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TTT, if anyone can get a micrometer or something to measure a stock GM flywheel bolt hole it would be GREATLY appreciated!

Thanks!
Old 09-23-2008, 10:07 AM
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I used ARP 330-2802 FW bolts for my old Fidanza FW. I also used them (brand new though) for my Textralia FW.
Old 09-23-2008, 11:17 AM
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Those are the exact bolts I tried to use but the "shoulder" of the bolt won't go into the hole of the flywheel. The threads go in no problem but the shoulder area of the ARPs seem wider than the threads and won't go into the flywheel hole on my Fidanza. I need to know if it's a manufacturing error on ARPs end or on Fidanzas end. I'd like to use the ARP bolts but if GM bolts will fit then that's what I'll stay with.
Old 09-24-2008, 01:14 AM
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TTT for the night. Still need to know stock flywheel bolt hole size.

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