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Superior Bottom-End Support for Your Chevy Big Block

Upgrade your engine's foundation with the PRW Billet Main Caps, designed to convert your Chevy 396-454 from a 2-bolt to a 4-bolt main configuration. These caps are manufactured from high-quality billet steel, providing the necessary rigidity to handle increased horsepower and torque without sacrificing bearing clearance or alignment.

Key Features and Advantages

• Engine Fitment: Optimized for Chevy 396-454 Big Block engine blocks.
• Structural Integrity: Billet steel construction offers superior strength over stock cast caps.
• Configuration: 4-bolt design ensures even distribution of clamping force.
• Precision Machined: Engineered for a perfect fit and straight bolt alignment.
• Set Contents: Includes 4 center main caps for a complete conversion.

Engine builders trust PRW for their commitment to quality and performance. By installing this 4-bolt conversion kit, you are effectively reinforcing the weakest point of the engine block, allowing for more aggressive tuning and higher RPM limits. This set is an essential upgrade for any enthusiast looking to build a reliable, high-output Big Block Chevy. The precision machining ensures that your main journals remain true, preventing premature bearing wear and catastrophic failure. Experience the difference in engine longevity and performance when you choose professional-grade components. Browse our full selection of engine internals at GGCRACING.