LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

What size are the cat bolts?

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Old Jul 12, 2004 | 05:30 PM
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Kurt Crosbie's Avatar
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From: Charlotte, NC
What size are the cat bolts?

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Old Jul 12, 2004 | 06:31 PM
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Kurt Crosbie's Avatar
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ttt
Old Jul 12, 2004 | 11:13 PM
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Old Jul 13, 2004 | 02:05 AM
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soma's Avatar
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15mm
Old Jul 13, 2004 | 02:51 AM
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Kurt,

Are you looking to remove the bolts, or buy new ones? GM part number 1636152, and the measurements are M10x1.5x87.5.

I dont recall the exact size -- dont have the factory exhaust system anymore -- but it looks like Soma gave you the size wrench you need (15mm-16mm), if you are looking to merely remove the bolts.

Last edited by Alex94TAGT; Jul 13, 2004 at 03:08 AM.
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