Holden LS / Chevrolet LS Billet Main Cap Set | CNC 5-Cap Upgrade

Reinforce Your LS Build with Billet Strength

Did you know that factory cast main caps in LS engines often begin to fail around 600–700 HP (450–520 kW)? At these levels, OEM caps can flex, crack, or allow cap walk — especially under boost, stroker builds, or heavy nitrous use. If your LS build is aiming anywhere near this power range, billet main caps are cheap insurance to protect your bottom end.

When pushing serious power through your Holden or Chevrolet LS engine, factory main caps become a known weak link. This CNC-machined Billet Main Cap Set provides the strength, precision, and reliability needed for high-performance applications — from street to strip.

💪 Why Upgrade to Billet Main Caps?

• OEM cast caps can flex or crack under heavy load and high RPM
• Billet steel caps reduce cap walk and maintain crank alignment
• Cheap insurance for boosted, stroker, or track-use LS builds

✅ Key Features:

• Full 5-cap set – replaces all factory LS main caps
• Precision CNC-machined from billet 4140 steel
• Engineered for strength and long-term durability
• Requires line boring after installation
• Zinc-coated for corrosion resistance
• Compatible with Holden LS1 / LS2 and GM Gen III/IV small block V8s

📦 Compatibility:

• Holden LS1 / LS2 5.7L & 6.0L V8s
• Chevrolet Gen III / Gen IV LS-based V8s (e.g. LS1, LS2, LS3)
• Not suitable for LSX or aftermarket Dart blocks

🔧 Installation Notes:

• Requires line boring or honing after installation for proper fit
• ARP main studs highly recommended
• Installation available at Milton Engine Developments (SA)

🇦🇺 Australian Made – Engineered by Experts

Manufactured in South Australia by Milton Engine Developments — trusted by engine builders and motorsport professionals nationwide.

In Stock – Ships from Adelaide

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