Product Description
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
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Product Reviews
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Keep it tight
Out all the bolts i researched these where best value option for price. These bolts where quality and direct fit and the threads are perfect, no burs no dings and better than OEM
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Quality
First time ordering from you on my own, great quality and professional and prompt!
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LS MAIN BOLT KIT
Purchased this kit for my 2004 LQ4 . arrived on time and as always with good attention to packaging . The fasteners in the kit all are OEM .
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LS main cap fasteners
I just started getting stuff from Michigan Motorsports and I’ve found that they ship out products very quickly! The catalog is easy to use, and they group parts together that you need to save time and money. The support staff is also very helpful! Great experience with Michigan Motorsports!
