Howards Cams H454 Extreme Billet Main Cap Engine Block

The Howards Cams H454 Extreme Billet Main Cap is a high-strength precision-machined main cap designed for serious performance engine builds. Manufactured from premium billet steel, this main cap provides superior strength and rigidity compared to factory cast components, making it ideal for high-horsepower applications where block stability is critical.

Key Features:

• CNC-machined from billet steel for maximum strength and dimensional accuracy
• Provides improved main bearing support and block rigidity
• Designed for high-performance and racing applications
• Precision-machined to exact tolerances for proper bearing crush and alignment
• Helps prevent main cap walk and crankshaft deflection under extreme loads

This billet main cap is an essential upgrade for engine builders looking to improve bottom end strength in boosted, nitrous, or naturally aspirated high-RPM applications. Proper installation requires line honing after installation to ensure precise main bearing bore alignment.