The Eagle rotating assembly for Jeep 4.2L (258) is built for pump-gas, naturally aspirated street vehicles. It combines a 3.895" cast steel crank, 6.123" 5140 I-beam rods with ARP 8740 bolts, forged 4032 ICON 3.905" inverted-dome pistons with a 10.8cc dish, plasma-moly file-fit rings and King SI rod and main bearings in a complete rotating assembly.
Eagle Jeep 4.2L 258 3.895in Cast Crank 6.123in I-Beam Rods -10.8cc 3.905in Pistons Rotating Assembly