Michigan Motorsports Complete Main Cap Fastener Kit for LS Engines
 
Fits 1997–2013 GM LS-Based V8 Engines | 4.8L, 5.3L, 5.7L, 6.0L & 6.2L
 
The Michigan Motorsports Complete Main Cap Fastener Kit is a stock-replacement solution designed for GM LS-based engines from 1997–2013. This kit provides all the critical fasteners required to properly secure the main caps during an engine rebuild or refresh, ensuring correct clamping force and bottom-end integrity. Ideal for stock rebuilds and mild performance applications, these fasteners restore factory-style fitment and reliability while simplifying the assembly process. An optional windage tray nut selection is available for builds that require them.
 
Key Features & Benefits
Complete Main Cap Fastener Solution: Includes all required bolts and studs to properly secure the main caps on LS-based engine blocks.
OEM-Style Replacement Hardware: Designed to match factory dimensions and clamping requirements for reliable bottom-end assembly.
Supports Engine Rebuilds & Refreshes: Ideal for stock rebuilds, bearing replacements, or short-block assembly where original fasteners are worn or missing.
Optional Windage Tray Hardware: Select the optional windage tray nuts if required for your specific engine configuration.
Michigan Motorsports Quality: Built to meet the demands of LS engine builders looking for dependable, cost-effective fastener solutions.
 
Included Components
10 × Main Cap Bolts
10 × Main Cap Studs
10 × Side Main Cap Bolts
Optional Windage Tray Nuts (select option if needed)
 
Key Fitments
LS-Based Engines: 1997–2013 4.8L, 5.3L, 5.7L, 6.0L, 6.2L
Engine Codes: LS1, LS2, LS3, LS6, L99, LSA, L92, L9H, L94, L76, L77, LY6, L96, LFA, LZ1, LY5, LMG, LMF, LH6, LC9, LY2, L20, L33, LQ4, LQ9, LR4, LM7, L59, LS4, LH8, LH9