3 Bolt Camshaft Install Kit 6.0 L LS2, LS3 Replace 1 Bolt Cam 2007-14
Descriptions of camshaft timing gears from 2nd image
A – Single bolt 4X camshaft gear from a 2007-2014 LS2 or LS3 engine. GM part number 12591689.
B – Three bolt 4X camshaft gear from a 2006 LS2 Corvette or from a 2006-2009 LS7 Corvette engine. GM part number 12586481.
C – Three bolt 1X camshaft gear from a 2005 LS2 Corvette or a 2005-2006 LS2 GTO/SSR/Trailblazer engine. GM part number 12576407.
D – Three bolt camshaft gear from a 1997-2004 LS1, LS6 or other Gen III V8 engines. No reluctor teeth are on the timing chain gear since the camshaft position sensor is at the back of the block and senses the camshaft speed from the reluctor machined into the back of the camshaft itself. GM part number 12552953.
Crankshaft reluctor wheel from 3rd image:
Left image – 24X crankshaft reluctor wheel found on all Gen III V8 engines (LS1, LS6, LQ4, LQ9) and early Gen IV V8 engines (2005 LS2 Corvette, 2005-2006 LS2 GTO, 2005-2006 LS2 SSR). GM part number 12551520 or 12559353.
Right image – 58X crankshaft reluctor wheel found on later Gen IV V8 engines (2006- 2007 Corvette LS2, 2006-2009 Corvette LS7, 2008-2009 Corvette LS3 etc.). GM part number 12586768.
Not shown – LS9 58X crankshaft reluctor wheel. This reluctor wheel is smaller and diameter and requires a different sensor.