Speedmaster PCE289.1011 Billet Steel Main Caps, 2 Bolt to 4 Bolt Splayed, Middle 3 Caps

The Speedmaster PCE289.1011 is a precision-engineered main cap upgrade kit designed to convert Ford 429 and 460 engines from OEM 2-bolt to a superior 4-bolt splayed configuration. This kit includes the middle three main caps, which are the most critical for controlling crankshaft movement and maintaining bearing integrity under high-stress conditions.

Key Features:

• CNC-machined from premium 1025 billet steel for exceptional strength and durability
• Splayed outer bolt holes feature 10-degree angled orientation to tie the block together and distribute clamping forces more effectively
• Reduces main bearing bore distortion under high cylinder pressures and rpm
• Increases cap rigidity to prevent closing up under extreme loads
• Ideal for stroker builds, forced induction applications, and high-rpm racing engines
• Direct replacement for OEM 2-bolt caps with enhanced 4-bolt design

These billet main caps are essential for builders looking to maximize reliability and longevity in performance Ford big block builds. The splayed bolt design provides superior block reinforcement compared to straight 4-bolt caps, making this an excellent choice for engines producing high horsepower and torque.