Description
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
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