Your Crate Engine Experts!
Your Crate Engine Experts!
$3,200.00
Stop waiting on backordered GM blocks! Comes Ready To Assembly! The PFU Performance LS Aluminum Block is a premium, cost-effective alternative to the hard-to-find GM LS3/L92 block. Cast from high-grade A356 aluminum and featuring upgraded billet main caps, this 4.065″ bore / 9.240″ deck block is ready for your next high-performance build. In stock, highly capable, and priced better than the factory equivalent.
If you are tired of stalling your engine build due to endless GM backorders and inflated factory pricing, Proformance Unlimited has your solution. The PFU Performance LS Aluminum Block shares the same foundational design features as the highly sought-after Chevrolet Performance LS3/L92 6.2L block, but we’ve taken it a step further. Not only is our block actually on the shelf and ready to ship, but it also comes in at a highly competitive price point—all while delivering superior bottom-end strength for high-horsepower applications.
Cast from premium A356 Aluminum, this block is built to handle serious power. Unlike standard factory blocks that use powdered metal, the PFU block features heavy-duty Billet Main Caps to keep your crank precisely where it belongs under heavy load. It accepts all proprietary LS3 hardware and components, making it a seamless drop-in replacement or foundation for a custom stroker build.
Material: High-strength A356 Aluminum
Deck Height: Standard 9.240″ deck
Main Caps: Upgraded Billet Main Caps for maximum bottom-end rigidity
Bore Size: 4.065″ standard bore (Safely handles up to a 4.080″ max bore)
Sleeve Compatibility: Can be safely bored to accept a 4.125″ dry sleeve kit
Stroke Capability: Can be stroker clearanced to accommodate up to a 4.125″ stroke
Cam Tunnel: Straight-through cam tunnel design
Hardware: 100% compatible with all proprietary LS3 parts and hardware
