This is a USED set of GM BBC pistons. These are Diamond 6241A100 7083B. These have a. 990 pin dia. Pins are included.
Pistons BBC 4.589" 1.26 ch NHRA IHRA Truck IMCA WISSOTA MUD K&N
Pistons BBC 4.500" 1.65 ch SRP PN 139482 NHRA IHRA Truck IMCA WISSOTA MUD K&N #1
Pistons BBC 4.500" 1.65 ch SRP PN 139482 NHRA IHRA Truck IMCA WISSOTA MUD K&N #2
Pistons BBC 4.290" 1.350 CH Speed Pro H1134CP +040 NHRA IHRA Truck IMCA WISSOTA
Pistons BBC 4.280" 1.645 ch WISECO PTS514A3 NHRA IHRA Truck IMCA WISSOTA K&N MUD
Pistons BBC 4.442" 1.55 ch CP 4516 NHRA IHRA Truck IMCA WISSOTA MUD K&N
