Katech LT1/LT4 Billet Steel Main Caps

Katech LT1/LT4 Billet Steel Main Caps

Strengthen the foundation of your Gen V LT engine with Katech LT1/LT4 Billet Steel Main Caps. Precision-machined from billet steel, these main caps are designed to provide increased durability and positive cap location for high-performance street, racing, naturally aspirated, supercharged, turbocharged, and nitrous-assisted LT engine builds.

Unlike factory LT main caps that rely on cast aluminum register walls, Katech LT1/LT4 Billet Steel Main Caps utilize LS7/LS9-style steel dowels to positively locate each cap within the block.

Key Features

• Precision-Machined Billet Steel Construction
• LS7/LS9-Style Steel Dowel Locating System
• Stronger than Factory Cast Aluminum Main Caps
• Designed to Help Maintain Main Cap Alignment Under High Engine Loads
• Ideal for Naturally Aspirated, Supercharged, Turbocharged, and Nitrous Applications
• Engineered And Machined By Katech Engineering In Clinton Township, Michigan, USA.

What's Included

• Complete Set Of Five Katech LT1/LT4 Billet Steel Main Caps
• LS7/LS9-Style Steel Dowels

Recommended Components

For maximum clamping force and durability, Katech recommends pairing Katech LT1/LT4 Billet Steel Main Caps with the ARP Gen V LT Main Stud Kit.

Fitment

Compatible with GM Gen V LT1 and LT4 engine blocks.

Important Installation Information

Block Machining Is Required. Installation requires machining the engine block for dowel installation. Professional machining and installation by a qualified engine builder is strongly recommended.

Why Upgrade To Billet Steel Main Caps?

Factory LT main caps rely on cast aluminum register walls for cap location. In demanding performance applications, maintaining precise cap alignment becomes increasingly important as cylinder pressure and engine loads rise.

Katech LT1/LT4 Billet Steel Main Caps combine billet steel construction with LS7/LS9-style steel dowels to positively locate each cap within the block. The result is a stronger foundation for naturally aspirated, supercharged, turbocharged, and nitrous-assisted LT engine builds.

Why Choose Katech?

For decades, Katech has engineered championship-winning engines for endurance racing, professional motorsports, and high-performance street applications. That same engineering philosophy is applied to every component we produce.

Designed for serious engine builders, Katech LT1/LT4 Billet Steel Main Caps deliver precision machining, durable construction, and the quality expected from one of the most respected names in performance engine development.