These billet steel main caps are the best available for your Mitsubishi 4G63 & 4G64 6-bolt engine. The design incorporates the maximum cross-sectional area for unmatched strength. CNC machined from the best super tough alloy steel for this application, ensuring trouble-free machining, strength, stability, and durability that you would expect from a bullet-proof set of main caps. These will take all the abuse you can throw at them.
This is a full kit that includes the Kiggly Racing 6-bolt Main Girdle for the ultimate in main cap stability.
- The 6-bolt main girdle ties all the main caps together, greatly stiffening and strengthening your engine’s bottom end.
- Cap to block fretting and bearing end/tang fretting are eliminated.
- Fits 4G63 and G4CS Blocks with minor grinding
These main caps will require use of ARP main studs, which can be found HERE. In addition, it is required that the block be line-bored & honed with the installation of these billet main caps.
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