Billet Main Caps 67-86 Chevy 350 Splayed Outer

PRW Industries billet main caps for 67-86 Chevy 350 engines with splayed outer bolts deliver precision-engineered performance for small block builds requiring OEM-compatible reliability. These forged steel caps are engineered for the 350 journal configuration and come as a complete set of three units, addressing a critical wear point in high-revving or heavily modified engines where stock components may not maintain proper clamping force or durability under sustained load.

The splayed outer bolt design reduces stress concentration at the cap mounting surface, a proven approach for engines running above stock power levels. These 4-bolt center caps are manufactured to tight tolerances, ensuring consistent bore alignment and oil gallery flow integrity. The steel construction provides superior strength compared to cast iron OEM units, critical for builders addressing rod knock or seeking insurance against catastrophic bearing failure during track duty or sustained full-throttle operation. Proper installation with a calibrated torque sequence is essential to realize the engineering benefit.

Builders restoring vintage Chevy 350 performance platforms—whether for off-road recovery, marine duty, or street performance—select billet main cap upgrades when original factory caps show wear, fatigue, or when engine displacement or boost modifications exceed safe limits for cast components. This set is a direct replacement for 350-journal small block Chevy applications and pairs with standard ARP fasteners and compatible bearing sets. Verification of journal size and bolt pattern compatibility with your specific block casting is necessary before purchase.