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Schleprock
Join Date: Sep 2000
Location: Frankfort IL USA
Posts: 16,639
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SC short studs are 20mm length. The longer studs (typically called "thick flange" when speaking in terms of SSI header installs) are 30mm or 35mm. Parts diagrams are not consistent with length for different SC years and that's why there's two lengths for the long size.
The Carrera 3.2L studs are clearly listed as 30mm length
FWIW I had the B&B headers on a 3.2L and the long studs were fine. But the locknuts were a pain and a test of patience!
Just for reference, since I mentioned them, the upper intake valve cover studs are 28mm and the exhaust valve cover studs are 35mm.
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Kevin L
'86 Carrera "Larry"
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