LS6 Pistons

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**cdn454LS6** · #1 02-06-2008, 02:35 AM

Can anybody please tell me the differance between the two?
GM 3963550 piston
GM 3963551 piston
Thanks very much

Ken

VintageMusclecar · #2 02-06-2008, 02:44 AM

Ken;

I believe the 550 piston is the original 11-1 closed chamber LS6 style piston, and the 551 is the 12.25-1 open chamber LS7 piston.

Hope this helps.
Eric

**cdn454LS6** · #3 02-06-2008, 03:53 AM

OK, Thanks very much Eric, That helps alot.
Ken

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