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
This kit includes the Jay Racing billet steel main caps for the Mitsubishi 4G63 & 4G64 6-bolt engine, Kiggly main caps girdle, and the required ARP main studs.
It is required that the block be line-bored & honed with the installation of these billet main caps.
This product was added to our catalog on Monday 08 February, 2010.