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Item #: 19260100
Reg. Price: $3,749.64
Our Price: $3,459.04


Cancer and Reproductive Harm



19260100 Replacess19244059 LSX Bowtie Tall Deck Block
• 3.880" finished siamese cylinder bores (ready to be finish-honed)
• 9.720" semi-finished standard deck height (ready to be decked)
• 4.500" maximum stroke (small base circle camshafts required)
• Capable of 364- to 500-cubic-inch displacements or more!
• Orange powder-coated finish
• Accepts Gen IV LS and LSX Series heads, cranks, cams, etc.
• Approximate finished weight is 250 pounds

Dream bigger.!
Because the new GM Performance Parts LSX takes the LS-series V8 to the ultimate extreme. Shaped from 50-plus years of V8 know-how and refined with the speed secrets of Warren "The Professor" Johnson, the LSX block was engineered to handle up to 2,500 horsepower, all for a price that will have the rest of the world wondering how we did it. Build your dream with LSX.


LSX Bowtie Block

     Buy the LSX Block

Click here to buy the LSX Bowtie Block

  • 100% CNC  Machined Cast Iron (280 KPa Tensile)
  • True Priority Main Oiling
  • 6 Head Bolts per Cylinder
  • Siamese Cylinder Bores
  • Standard 4.400" Bore Spacing
  • Standard Deck Heights (9.700"Tall Deck to Follow)
  • Increased Deck Thickness
  • LS7 6-Bolt "Doweled-in-Place" Billet Main Caps
  • Max 4.500" Stroke (Tall Deck Version Only)
  • Capable of 364 to 500+cid (Tall Deck for Larger Displacements)
  • Wet Sump and Dry Sump Capability
  • Deep Skirted and Dry Sump Capability
  • Deep Skirted Head Bolt Holes
  • Orange Powder Coat
  • Maintains all OEM LS family exterior mounting features
  • Accepts all Gen III & IV LS Heads, Cranks, Cams, Etc
  • Includes Unique New Cam Retainer, Rear Cover and Lifter Retainers and OEM
  • replacement Cam Bearings
  • Front Motor Plate Mounting Holes Added
  • Added Material Above Cam Bearings for Additional Strength
  • Approximate Finished Weight: 225 Lbs. (Standard deck)


Here's what you get: Here's what you can do:
True priority main oiling for standard hydraulic roller lifters Oil feed holes can be plugged/restricted for mechanical lifters
9.26" semi-finished deck heights (standard deck) Can be machined safely to 9.22" deck heights (standard deck)
6-bolt LS7 billet main caps with std. 10mm LS7 fasteners Can be machined for aftermarket premium 11mm fasteners
3.990" bore, ready for honing Maximum 4.250" bore @.200" minimum wall thickness
6-bolt LSX bolt pattern Standard pattern for naturally aspirated applications
   11mm standard bolts Can be machined for 1/2" aftermarket head studs
    8mm exterior/interior bolts Modified 6-bolt pattern (for boosted applications)
All 5 cam bores for standard (small O.D.) bearings P/N 12453169 Can be machined to accept 60mm roller bearings
Added material around standard .842" lifter bores Can be machined for larger lifters and/or 1.060" bronze bushings
7th transmission bolt hole added (per Early SBC) Stud can be installed for applications where sanctioning body requires
Front motor plate mounting holes added For racing chassis applications (sprint car, drag racing, truck pulling, etc)
O-ringed screw-in soft plugs For external heater or coolers
Accommodates any LS small block oil pan or oil pump Standard LS wet sump systems, and LS7 dry sump systems fit
External oil pump feed @ rear of block Front oil feed lines can be plugged and external oil pump/aftermarket dry sump systems can be used.
Belt cam drive can be accommodated
Main web bay to bay breathing holes for increased HP  
Access windows for cylinder head stud access (intake side)  
Extra breathing pocket added near starter for better windage  


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