This is a USED set of GM BBC pistons. These have a. 990 pin dia.
Pistons SBC 4.155" 1.062 CH NHRA IHRA Truck MUD UMP IMCA WISSOTA K&N CARS ASA
Pistons SBC 4.155 TC 2945.030 Silvolite Claim NHRA IHRA Truck MUD IMCA WISSOTA
Pistons SBC 4.155" 3.75" Stk Diamond 6614 NHRA IHRA Truck MUD IMCA WISSOTA K&N
Pistons SBC 4.155" 3.48" Stk Diamond 6615 NHRA IHRA Truck MUD IMCA WISSOTA K&N
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
