The Aeroflow Cast Iron Engine Block is a strong foundation for a street performance GM LS build, offering the durability and precision needed for serious engine assembly. Cast from premium high strength Class 32B iron, this semi finished bare block is designed to reduce machine work while giving you a dependable starting point for your custom build. Its heavy duty construction and standard deck height help support reliable head gasket sealing and compatibility with commonly used off the shelf LS components.

Designed around a 4.000 inch bore and a 9.240 inch deck height, this engine block suits builders looking for a quality aftermarket option with practical fitment advantages. It features 6 bolt main caps for added bottom end strength, along with dual knock sensor locations to accept either LS1 or LS2 style sensors. The rear cam position sensor provision also gives flexibility for different setup requirements, making it suitable for a wide range of performance applications.

With its thick wall casting and thoughtful LS architecture, this block provides a solid base for engines that need strength, reliability, and easier component matching. It is ideal for enthusiasts wanting to build from a fresh casting rather than working with an old worn production block.

Features & Benefits

• Heavy duty cast iron construction for long term durability
• Semi finished bare block helps minimise machining time
• 4.000 inch bore supports GM LS performance builds
• 9.240 inch deck height for standard style component compatibility
• 6 bolt main caps provide increased bottom end strength
• Dual knock sensor locations allow flexible sensor fitment options