Anyone recognize this shim?
Melting Slicks
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2025 C4 of the Year Finalist - Unmodified
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Closest thing I could find that looks like that with an Internet search...
But not for a Corvette.
But not for a Corvette.
Team Owner
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What is the center-to-center dimension of the slots? OR width of the slots and the dimension of the divider, a C4 is mostly Metric spec so Metric dimensions might be preferred. Does the other side of it display some more relevant 'witness' marks?
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Pro
Joined: May 2025
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From: OK
56.4
28.03
28.3 center to center
Or pretty near it.
Has to be from the driver side of the dash, not really any conclusive witness marks despite it being soft aluminum. Looks like adhesive residue on both sides.
28.03
28.3 center to center
Or pretty near it.
Has to be from the driver side of the dash, not really any conclusive witness marks despite it being soft aluminum. Looks like adhesive residue on both sides.
Melting Slicks
Joined: May 2019
Posts: 3,115
Likes: 1,346
From: Mid-Atlantic
2025 C4 of the Year Finalist - Unmodified
2023 C4 of the Year Finalist - Unmodified
2022 C4 of the Year Finalist - Unmodified
2021 C4 of the Year - Unmodified Finalist
I've done stuff like that. Pretty much everybody has, I think.
Last edited by Natty C; Mar 12, 2026 at 10:57 PM. Reason: Typos...
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From: OK
True enough. It looks like a GM part number on it but I think it's one of those that isn't in any of the usual parts catalogs. Or could be coincidence.
Team Owner
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I don't have a clutch master spacer to confirm but ironically that part number is very similar and in sequence of spacer and correct bolt. 14066450 is bolt and 14066452 is the spacer. Maybe a GM assembly/alignment device of sorts?
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I did however just replace that thing (again) the other day but it's not ringing a bell laying there looking at it.
Last edited by wolf_walker; Mar 13, 2026 at 11:39 AM.
Team Owner
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I saw that too when I was google'ing but I can't see where it would go on the clutch master, the spacing is too narrow for the bolts and there's no hole for the rod.
I dud however just replace that thing (again) the other day but it's not ringing a bell laying there looking at it.
I dud however just replace that thing (again) the other day but it's not ringing a bell laying there looking at it.
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Pro
Joined: May 2025
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From: OK