Katech LT1/LT4 Billet Steel Main Caps

Katech LT1/LT4 Billet Steel Main Caps

BILLET STEEL CONSTRUCTION · LS7/LS9-STYLE DOWEL LOCATION · ENGINEERED FOR HIGH-PERFORMANCE GEN V LT BUILDS

Katech LT1/LT4 Billet Steel Main Caps are engineered to strengthen the bottom end of compatible GM Gen V LT Engine Blocks used in demanding street, racing, naturally aspirated, supercharged, turbocharged, and nitrous-assisted applications. Precision-machined from billet steel, the caps provide increased strength, while LS7/LS9-style Steel Dowels positively locate each cap within the Engine Block to improve main cap stability and alignment.

Unlike factory LT Main Caps that rely on cast aluminum register walls for location, the Katech design uses a positive steel dowel locating system. Installation requires precision Engine Block machining by a qualified engine machine shop.

Features & Benefits

• Precision-Machined Billet Steel Construction
• Complete Set of Five Billet Steel Main Caps
• LS7/LS9-Style Steel Dowel Locating System
• Provides Positive Main Cap Location Within the Engine Block
• Designed to Improve Main Cap Stability and Alignment
• Provides Increased Strength Compared with Factory LT Main Caps
• Suitable for Naturally Aspirated, Supercharged, Turbocharged, and Nitrous-Assisted Engine Builds
• Engineered and Machined by Katech Engineering in Clinton Township, Michigan, USA!

Specifications

• Product Type: Main Cap Set
• Engine Family: GM Gen V LT1 and LT4
• Material: Billet Steel
• Main Caps Included: Five
• Locating System: LS7/LS9-Style Steel Dowels
• Installation: Engine Block Machining Required

Vehicle & Engine Fitment

Chevrolet

• 2014–2019 Chevrolet C7 Corvette Stingray with LT1 6.2L Engine
• 2017–2019 Chevrolet C7 Corvette Grand Sport with LT1 6.2L Engine
• 2015–2019 Chevrolet C7 Corvette Z06 with LT4 6.2L Supercharged Engine
• 2016–2024 Chevrolet Gen VI Camaro SS with LT1 6.2L Engine
• 2020–2024 Chevrolet Gen VI Camaro LT1 with LT1 6.2L Engine
• 2017–2024 Chevrolet Gen VI Camaro ZL1 with LT4 6.2L Supercharged Engine

Cadillac

• 2016–2019 Cadillac CTS-V with LT4 6.2L Supercharged Engine
• 2022+ Cadillac CT5-V Blackwing with LT4 6.2L Supercharged Engine
• 2023+ Cadillac Escalade-V with LT4 6.2L Supercharged Engine

Engine Applications

• GM Gen V LT1 Engine Blocks
• GM Gen V LT4 Engine Blocks
• Compatible Naturally Aspirated, Supercharged, Turbocharged, and Nitrous-Assisted LT Engine Builds

Important Fitment Notes

• Designed for Compatible GM Gen V LT1 and LT4 Engine Blocks
• Verify Engine Block Compatibility Before Ordering
• Engine Block Machining Is Required for Main Cap Installation
• Machining Is Required for Installation of the LS7/LS9-Style Steel Dowels
• Align Boring and/or Align Honing Is Required After Main Cap Installation
• Katech Recommends an ARP Gen V LT Main Stud Kit for Increased Clamping Force and Durability
• Final Main Bearing Bore Dimensions Must Be Verified by a Qualified Engine Machine Shop

What’s Included

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

Why Choose Katech?

Since 1977, Katech has engineered championship-winning engines and precision performance components for professional motorsports, OEM development programs, engine builders, and performance enthusiasts. Every Katech component is developed with an emphasis on strength, accuracy, and dependable performance.

Katech LT1/LT4 Billet Steel Main Caps combine precision-machined billet steel construction with an LS7/LS9-style steel dowel locating system to provide a stronger, more stable foundation for high-performance Gen V LT Engine Builds.