Chevrolet Performance Chevy Performance LSX Cast Iron Block - Semi Finish 9.260 DH 19417351

The LSX Bowtie block is purpose-built for builders who demand race-proven engineering without the race-car price tag. Developed in collaboration with NHRA Pro Stock legend Warren Johnson, this CNC-machined cast iron foundation delivers the structural integrity and precision tolerances required for high-horsepower builds—whether you're targeting 364 cubic inches or pushing past 482 CI. If you're serious about LS platform performance, this is the block that lets you build exactly the engine you envision.

Technical Specifications:

• 100% CNC-machined cast iron
• 3.880" finished bore diameter
• 9.260" semi-finished deck height
• 6 head bolts per cylinder
• LS7-style 6-bolt main caps
• Extra-thick siamese bores
• Standard 4.400" bore spacing
• Accepts Gen III/IV LS heads
• Supports up to 4.250" stroke
• Capable 364-482+ cubic inches
• True priority main oiling
• Wet/dry sump capable
• Increased deck thickness
• Deep-skirted head bolt holes
• 8mm 5th/6th head bolts
• Standard .842" lifter bores
• External oil pump feed
• Front motor plate mounting
• Reinforced cam bearing area
• Screw-in soft plugs included
• Approximate weight: 225 lbs
• Orange powder coat finish
• Includes cam retainer assembly
• Includes replacement cam bearings
• MPN: 19417351