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Concept Performance LSR-SD1X - Aluminum LS Standard Deck Race Block

-Cast in the USA from proprietary 356 Aluminum Ingot, Machined in the USA
-Heat treated to T-6 Specifications
-Block Tooling has been designed and engineered to eliminate casting inconsistencies

-Triple cross braced lifter valley
-Extra material added to the front and rear valley walls
-Reinforced Deck – 0.750” Thick
-Reinforced Main Webbing
-Extra material around the lifter bosses for improved strength and lifter bushing upgrades
-Extra material in cam tunnel for 60-MM cam bearings if desired

-Standard Deck 9.240” – Shipped at approximately 9.245” to allow final deck height setting
-LSX 6-Bolt cylinder head pattern, Works with stock LS cylinder heads also
-Shipped at approximately 4.120” bore to allow final finish
-Fits early style GM Transmissions and has all 7 mounting points
-113-LBS Weight
-High strength premium grade USA steel main caps
Availability: Largest LS Inventory in the USA. Ship Today Service!
Shipping: 1 to 3 Day Delivery to Most Locations
USD 4623.00 4623.00 1 4623.00
Pricing: $4,623.00

Customize Your Item

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Accepts any LS production front cover, requires the LSX rear cover (P/N - 19166179)and LSX cam plate and o-ring (19244460 & 19166178).

Each block comes with a "Block Package Kit" which includes the following:
-Cam bearings
-Oil dumbbell
-Plug & dowel pin kit

Please see the "DOCUMENTS" tab for warranty information.

California Proposition 65

California Prop 65WARNING: Cancer & Reproductive Harm -


  • LSR-SD2X
  • LSR-SD2X
  • 111111111111
  • Concept Performance
  • Largest LS Inventory in the USA. Ship Today Service!
  • New

Shipping Information

  • Item Requires Shipping
  • 113.0 lbs.
  • W23.0000” x H13.0000” x L39.0000”
  • 1 to 3 Day Delivery to Most Locations

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