The Eagle rotating assembly for Jeep 4.2L (258) is aimed at pump-gas, naturally aspirated street builds. This complete package includes a 3.895" cast steel crank, 6.123" 5140 I-beam rods fastened with ARP 8740 bolts, forged 4032 ICON 3.935" inverted-dome pistons, plasma-moly file-fit rings and King SI rod and main bearings.
Eagle Jeep 4.2L 258 3.895in Cast Crank 6.123in I-Beam Rods -27cc 3.935in Pistons Rotating Assembly