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Chevrolet Performance 12480030
Mail-In Rebate
Chevrolet Performance® Summer Block Party Rebate
Expires on: September 30, 2019

Purchase Chevrolet Performance Engine Blocks Or Cylinder Heads and Receive up to $200 On a Prepaid Visa!

Chevrolet Performance C5R Racing Bare Aluminum Block Developed for C5R Corvette Racing Program, 900HP


Save $20 Off $250, $50 Off $500, $100 Off $1,000, $150 Off $2,000. Promo Code: SAVEMORE exclusions apply

Truck Freight:$119.00
Chevrolet Performance C5R Racing Bare Aluminum Block Developed for C5R Corvette Racing Program, 900HP $9,235.09
Out of stock
C5R Racing Bare Block
  • Developed for C5R Corvette racing program
  • Premium "hipped"* and x-rayed 356-T6M aluminum block
  • 4.117" finished bore, 4.160" max bore
  • Capable of over 900HP!
  • Chevrolet Performance 12480030 Details

    Aluminum Production LS-Series Engine Blocks

    This is the ultimate race version of the aluminum LS block which enjoys the state-of-the-art technology necessary to build an LS engine to over 440 cubic inches, and 900 horsepower! The C5R Race Blcok has seen serious race time (including wins at LeMans, GT-S, and the 24 hours of Daytona). If you are building a "big" small block for your late model Camaro, Firebird, or Corvette, this is the aluminum block for you.

  • Max HP: 900
  • Max Stroke: 4.10"
  • Pro Use
  • Production oiling system
  • 6-bolt SAE 8620 dowel located steel main bearings cap
  • SAE 4340 premium main cap fasteners
  • 9.240" deck height
  • For use with LS1, LS6, LS2, L76, LS7 and C5R cylinder heads
  • Siamesed water jackets for larger bore size
  • Standard camshaft location and bore size
  • 100% CMM measured for accuracy
  • Completely "blueprinted" and "squared"
  • Included 4340 premium head studs
  • AN O-ring plugs throughout

    *HIP is the acronym for Hot Isostatic Pressure. This process puts the blocks in a sealed vessel where a vacuum is first used to remove room air and any possible contaminants. The vessel is filled with high pressure nitrogen (up to 30,000-psi) and then heated to the required temperature and sustained for a determined amount of time. The cooling process is also a controlled procedure to ensure maximum strength and proper heat treat. This extreme high pressure and heat removes almost 100% of the internal porosities that are generated during the casting process. The material integrity, strength and fatigue life increases significantly.

  • Specifications:

    Cam Bearings Included
    Cylinder Bore as Shipped (in.)
    Cylinder Bore Diameter (in.)
    Deck Height (in.)
    Engine Block Material
    A-356 aluminum
    Engine Block Style
    Stock/OEM standard deck
    Finished Cylinder Bores
    Freeze Plugs Included
    Main Bearings Included
    Main Cap Fasteners Included
    Main Cap Material
    Main Caps Included
    Main Journal Type
    Sold individually
    Raised Cam Location
    Rear Main Seal Style
    Manufacturer's Part Number:

    These Chevrolet Performance LS Series Engine Blocks are driving a new generation of street and racing enthusiasts by providing a foundation for serious performance achievements. Chevrolet took a chance with the LS engine, staying true to the pushrod small block and continued to develop this technology to the point that building a daily-driven, 500-plus HP car is no big deal. These blocks are designed specifically to handle from 450-900 horsepower on LS-Series late model small block engines, which include the LS1, LS2, LS4, LS6, LS7, LQ4, LQ9, and L76. If you are building a full out track only racing engine or a mild street cruiser there is a strong and durable LS cylinder block available to assure that you produce the power you require safely!

  • Deep-Skirt Casting (the block side extends below the crankshaft centerline)
  • 6-Bolt Cross-bolted Main Caps
  • Strong and Lightweight Aluminum Alloy Casting (most production blocks)
  • Provisions for the latest in Engine Control Management
  • 9.240" Standard Deck Height
  • 2.560" Standard LS Crankshaft Journal Diameter
  • 1-Piece Rear Main Seal
  • Optional Wet or Dry Sump Oiling

  • What is the cubic inch?

    Asked by: Julian Greene
    This is a bare block only with 4.117 bore. Which ever crank the end user decides to use will determine the cubic inches.
    Answered by: Jon Jegs Tech
    Date published: 2018-03-29
    • y_2019, m_9, d_21, h_17CST
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    • clientName_jegs

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