Mits. Rod Bolt Kit - Fits 94-Up 4G63

The ARP Mitsubishi Rod Bolt Kit for 94-up 4G63 engines is engineered for builders and enthusiasts pushing their 4-cylinder platforms to serious performance levels. This set of eight premium connecting rod bolts addresses the critical weak point in high-boost and high-RPM builds: factory fastener failure. When you're adding forced induction, nitrous, or aggressive cam profiles, OEM rod bolts become a liability—they stretch, yield, and invite catastrophic bottom-end failure. ARP's purpose-built solution eliminates that risk.

Manufactured from 8740 chromoly steel and finished in black oxide, these 8 mm bolts deliver superior tensile strength and clamping force compared to factory fasteners. The 8740 alloy is specifically chosen for its ability to withstand cyclic loading without fatigue fracture—essential when connecting rods are spinning 7,000+ RPM under boost. Black oxide finish provides corrosion resistance while maintaining the precise surface finish required for consistent preload. Each bolt in this kit meets ARP's stringent specifications for concentricity, hardness, and dimensional accuracy, ensuring even clamping load distribution across all eight fasteners.

This kit is essential for any 4G63 engine destined for turbo, supercharger, or naturally aspirated high-revving duty. Whether building a street-legal daily driver with modest boost or a track-focused race engine, upgrading from factory rod bolts to ARP fasteners is one of the highest-ROI reliability upgrades available. Installation requires an ARP bolt stretch gauge and proper torque sequence procedure—critical steps that ensure maximum clamping force and prevent bolt preload loss during operation. Compatible with all 94-and-later 4G63 variants, including DOHC and SOHC configurations.