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LSX454 4.185 Bore Production Finished and Honed 4.185" Bowtie Block 19417353

  • Product Code: 19417353
  • Dispatch Time: 40

£3,900.00 EX VAT

£4,680.00 INC VAT

Product Overview:

Chevrolet Performance 19260099 - LSX Finished and Honed 4.185” Bowtie Bare Block

The LSX Bowtie Engine Block showcases three major improvements

1. Added support on the deck surface.

2. Material Strength: 400 mPa tensile strength, compared to the 250 mPa previously offered. Material: Iron, G4000 with Molybdenum

3. Annulus cut within the cam bearing surface within the block for improved oil feed location. This allows for the oil feed hole to be located at three o'clock position versus the six o'clock position.


Block as used in LSX454 & LSX454R Crate Motor

Product Details

Engine Block Material: Cast Iron
Engine Block Style: GM LSX
Engine Block Style: Brand New
Engine Configuration: Bare Block
Engine Family: GM LS
Engine Size: 7.4/454



• Front oil feed holes can be plugged/restricted for mechanical flat tappet or mechanical roller lifter applications
• Can be machined safely to 9.200" deck height
• Maximum 4.200" bore at .200" minimum wall thickness (naturally aspirated applications)
• Head bolt holes can be machined for 1/2" studs
• Cam bores can be machined to accept 60mm roller bearings
• Can be machined for larger diameter lifters and/or 1.060" bronze bushings
• Front oil feed lines can be plugged and external oil pump and/or aftermarket dry sump systems can be used via oil pump feed at rear of block – may be required with certain large stroke/aluminum rod combinations
• Belt cam drive systems can be accommodated – some machining will be required
• Front motor plate can be used for racing chassis applications (sprint car, drag racing, truck pulling, etc.).
• Threaded water plugs can be used for external heaters or coolers
• Extra stock for main bearing align-honed
• 400 mPa Tensile strength iron


LSX Bowtie Block specs and features include:

• CNC-machined cast iron block
• True priority main oiling
• 6-head bolts per cylinder
• Standard 4.400” bore spacing
• Extra-thick siamese cylinder bores
• Semi-finished, machined thicker decks
• LS7-style, 6-bolt dowel-located billet main bearing caps
• Wet-sump and dry-sump oiling capability
• Production-style deep-skirt head bolt holes
• Production bolt hole and thread sizes
• Maintains production exterior accessory mounting provisions
• Front motor plate mounting holes added
• Additional material cast around cam bearings for greater strength
• 8mm exterior/interior fifth- and sixth-head bolt holes
• Standard 0.842” lifter bores
• Accommodates all LS oil pumps and oil pans
• External oil pump feed (rear of block)
• Main web bay-to-bay breathing holes to support greater horsepower
• Includes unique cam retainer, rear cover and lifter retainers

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