Eagle Mitsubishi 4G63 89-92 3.937in Crank 5.900in H-Beam -19cc 85.5mm Pistons Rotating Assembly

This is the Eagle Competition Rotating Assembly for your Mitsubishi 4G63 engine, covering the 1989-1992 model years. What you get in this kit is a complete package designed to handle serious performance, including everything you need to rebuild the core of your engine's power delivery. It features a forged 4340 crankshaft with a 3.937-inch stroke, 5.900-inch H-beam connecting rods secured with 3/8-inch ARP 2000 bolts, and 85.5mm forged 2618 Mahle pistons with a -19cc inverted dome. You also get plasma-moly file-fit piston rings and King XP rod and main bearings to ensure smooth operation and durability.

This assembly is built for demanding use, making it a solid choice for racing applications, especially those involving nitrous or forced induction. The forged 4340 crank and H-beam rods are strong enough to withstand the increased stresses these setups create. The Mahle pistons are forged from 2618 aluminum, known for its strength and ability to handle high temperatures and pressures, and the -19cc dome helps achieve a specific compression ratio when paired with the right cylinder head. The inclusion of ARP 2000 bolts for the connecting rods means you're getting reliable hardware that's trusted in high-performance builds. The plasma-moly file-fit rings allow for precise gapping to match your engine's bore and intended use, ensuring good sealing and oil control.

When installing this rotating assembly, remember that the piston rings are file-fit, meaning they need to be gapped to your specific cylinder bore dimensions. This is a critical step for proper engine break-in and long-term performance. Also, be aware that this assembly is not CARB approved and cannot be shipped to California. It's always a good idea to consult your engine builder or a trusted mechanic for specific installation procedures and recommendations tailored to your build.