This is a NEW never USED set of SBC TRW pistons, part #L2311 +.030. They are for a 4.155" bore motor. These have a. 927 pin dia. They have a compression height of about 1.575".
Pistons SBC 4.155" TRW L2311 +.030 ARCA NHRA IHRA Truck MUD UMP IMCA WISSOTA
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