Thread: NOS 68/69 427 ZL1/L88 Piston & Ring Set GM 3947886 / 3888308
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Old 02-09-2022, 05:21 PM
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Not sure what your asking here. Are you inquiring as to whether these are for an OPEN or CLOSED chamber cylinder head?
Can somebody else chime in here? Aren't the ZL1 / L88 motors closed chamber?
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