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Chevrolet Performance 19260099K

LSX Finished Engine Block & Rotating Assembly Kit

Chevrolet Performance 19260099K
Easy Kit


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Truck Freight: $119.00
Chevrolet Performance 19260099K LSX Finished Engine Block & Rotating Assembly Kit $6,488.31
LSX Block and Rotating Assembly Kit
  • Finished Engine Block #809-19260099
  • LSX454 Rotating Assembly #809-19259254

  • Chevrolet Performance 19260099K Details

    Block and Rotating Assembly Kits

    Build your own ''LSX Stroker'' with this rotating assembly used in our powerful LSX454 crate engine:

  • 4.185" Bore
  • Finished and Deck Plate Honed
  • 9.240" Standard Deck Height
  • Crankshaft 4340 Forged Steel 4.125" Stroke, 8-Bolt Flange
  • Connecting Rods 4340 Forged Steel
  • Pistons Forged Aluminum with Coated Skirt, 4.185" Bore
  • Also includes performance piston rings, rod and main bearings

  • Specifications:

    Manufacturer's Part Number:

    Delivering the seemingly impossible combination of professional race-level strength with entry-level affordability, the LSX Bowtie Block is the next revolution in high-performance engine building. This durable iron block is based primarily on GM's production LS7 block but cast with more material in key areas, including a thicker deck and bores, to support 454 cubic inches or more. Unique six-bolts-per-cylinder-head clamping capability permits forced induction and nitrous combinations of greater than 2,000 horsepower.

    Because the LSX Bowtie Block is based on production LS blocks, all LS-Series Gen IV cylinder heads, crankshafts, oil pans, camshafts, and accessories bolt right to it. There's a tall deck version to build larger engines, and Chevrolet Performance even offers the LSX Bowtie Block semi-finished so you can do it your way. Whether building a ''tame'' 500 HP street engine for your hot rod or a 1,700 HP turbo engine for an Outlaw drag racer, the LSX Bowtie Block is the foundation for an unbeatable combination at an unbeatable price!

    LSX Bowtie Block Specifications
  • 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
  • Powdercoated orange

    For the advanced competition engine builder, the new LSX Bowtie Block also features:
  • 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
    JEGS Easy Kits are designed by JEGS professionals so you get all the parts you need!

  • Does the crankshaft come balance or will I have to get that done myself? Thank you

    Asked by: Addy186
    This kit comes balanced internally.
    Answered by: Jon Jegs Tech
    Date published: 2018-02-19

    Are these pistons capable of withstanding a twin turbo set up at about 1200hp

    Asked by: Rc210
    The block can handle that power, you would be right at the limit of the pistons HP rating.
    Answered by: Rusty B
    Date published: 2018-01-03

    I'm under the assumption that this is the same block and rotating assembly that is being used in the Chevrolet Performance LSX454 Crate Engine, p/n 809-19244033. Then why are they getting a much higher compression ratio of 11:1 with 70cc heads?

    Asked by: Aussie007
    This piston is shown to have 11:1 with a 66cc head and a thin head gasket, These are approximate numbers. That is the piston that comes with this kit.
    Answered by: Rusty B
    Date published: 2017-10-16

    Hi, What is the compression ratio of the LSX454 kit using 72cc heads and .51in head gasket? Is the rotating assembly balanced? And, what would be the cost of freight to Townsville, Queensland, Australia, 4817? Thanks, John

    Asked by: Aussie007
    This engine would be approximately 9:1 with a 72cc cylinder head. The rotating assembly is internally balanced. Please call us at 1-800-345-4545 to get a shipping quote.
    Answered by: Rusty B
    Date published: 2018-02-25
    • y_2018, m_5, d_22, h_11CST
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    Some parts are not legal for use in California or other states with similar laws / regulations