Chevrolet Performance Chevy Performance LSX Cast Iron Block - 4.185 Bore Finished 19417353

The LSX Bowtie block is engineered for builders who demand maximum durability and oiling efficiency in high-horsepower applications. With 400 mPa tensile strength—60% stronger than previous generations—this cast iron foundation handles extreme boost pressures and sustained rpm without compromise. Whether you're building a street terror or competition engine, the optimized oil delivery system and reinforced main webbing ensure reliability where it counts.

Key Features & Specifications:

• CNC-machined cast iron
• G4000 with molybdenum
• 400 mPa tensile strength
• 4.185" bore diameter
• 9.240" deck height
• 6-bolt main caps
• 6-bolt head bolts
• 1-piece rear seal
• Extra-thick siamese bores
• Semi-finished, machined decks
• LS7-style dowel-located mains
• Wet-sump/dry-sump compatible
• Priority main oiling
• 3 o'clock oil feed location
• Standard 4.400" bore spacing
• 0.842" lifter bores
• Accommodates all LS pumps
• Deep-skirt head bolt holes
• 8mm fifth/sixth bolt holes
• Bay-to-bay breathing holes
• Includes cam retainer/covers
• Production accessory provisions
• Bare block, finished and honed
• GM LS-Series platform