Concept Performance LSR Solid Aluminium LS Engine Block LSR-FMJ-SD2X 4.117" Bore, 9.240" Deck Height with Dual Crossbolted Main Caps
Concept Performance LSR Solid Aluminium LS Engine Block LSR-FMJ-SD2X 4.117" Bore, 9.240" Deck Height with Dual Crossbolted Main Caps
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Concept Performance LSR Solid Aluminium LS Engine Block LSR-FMJ-SD2X 4.117" Bore, 9.240" Deck Height with Dual Crossbolted Main Caps

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$9,350.00
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$9,350.00
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$10,438.59
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Just when you thought LSR had hit every benchmark...BAM! They are back in your face with a SOLID (water jacket-free) LSR Double Crossbolted block! 

Perfect for Drag Racing boosted alcohol combos producing 2000+hp

Solid Fill - No Water Jacket

Standard 9.240" Deck Height

4.117" Bore

Dual Crossbolted Main Caps 2-4 

Part # LSR-FMJ-SD2X

 

Features And Benefits

The LSR aluminium engine block is cast of a proprietary 356 T6 Aluminium Ingot, featuring Spun Ductile Iron Sleeves. The standard deck 9.240" and the tall deck 9.720", with or without raised cam, will be available with our exclusive Double Cross Bolted Main Cap Feature.

Reinforced from Top to Bottom...​


  • Cross Braced Lifter Valley with Individual Drain Backs

  • 40% larger Main Cap Surface with a Double Crossbolt Option

  • Short or Tall deck blocks feature a Heavy Duty 0.750" deck thickness

  • Added Stock to the Front and Rear Valley Walls

  • ARP Main Stud Options

  • Maximized Crank saddle Radius​

  • ​Added 7th Transmission Bolt Hole to Accept Early Style GM Transmission

  • Standard Deck Height 9.240"

  • Bore 4.117 semi finished" 

  • Front Oil Feed Line Can Be Restricted for Mechanical Lifter Options

  • 6 Bolt Cylinder Head Pattern

  • Cam Bore Can Be Machined to Accept 60mm Roller Bearings

  • Lifter Bore Diameter Can Be Increased for Different Applications

  • ​The Double Crossbolt option gives you an 8 bolt main on 2, 3, and 4.

  • All OEM LSX parts such as covers, pans and accessories work seamlessly with the LSR

  • With the LSR, you are buying 100% American made and finished product

 

LSX Magazine Article