Thread: LS6 Pistons
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Old 02-06-2008, 02:44 AM
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Default Re: LS6 Pistons
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
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