KB Claimer Performance Series SB Chevy Flat Top Piston Set - 4.155" Bore - 3.750" Stroke - 5.565" Rod Length 4122LRGRD 1979-1993 GMC K2500

1979-1993 GMC K2500

0L EFI passenger engine

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KB Claimer Performance Series SB Chevy Flat Top Piston Set - 4.155" Bore - 3.750" Stroke - 5.565" Rod Length 4122LRGRD 1979-1993 GMC K2500Achieve maximum performance with high piston ring placement and low thermal conductivity. Top rings operate at higher temps and require slightly larger end gaps (4. 000" bore x . 0065" gap factor = . 026" total end gap). It is recommended that ignition timing be retarded 2 4 degrees. Sold in sets of eight with wrist pins. Coated skirts. Designated as O. E. relacement for engines manufactured in years Truck 69 78, Passenger Car 69 70, Corvette 90 91.