Concept Performance LSR 6-Bolt Aluminum Block, Standard Deck

Concept Performance prides itself in providing quality products that are 100% cast, machined, and assembled in the United States of America. The LSR aluminum engine block is cast of a proprietary 356 T6 Aluminum Ingot, featuring Spun Ductile Iron Sleeves. The standard deck 9.240″ and the tall deck 9.750″, with or without raised cam.

Features

• Cross Braced Lifter Valley with Individual Drain Backs
• 40% larger Main Cap Surface
• Short or Tall decks feature a 0.750″ Deck
• Added Stock to the Front and Rear Valley Walls
• Pro-Gram Engineering Main Caps SAE 1045 Billet
• ARP Main Stud Kit
• Maximized Crank saddle Radius
• Added 7th Transmission Bolt Hole to Accept Early Style GM Transmission
• LSR Engine Block weighs 113 lbs with Main Caps
• Standard Deck Height 9.240″Tall Deck Height 9.750″
• Bore Range 4.065″ – 4.200″
• 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
• All GMPP LSx parts such as covers, pans and accessories work seemlessly with the LSR
• Requires GMPP LSx block cam retainer plate and seal, as well as rear cover plate and seals (not included)
• With the LSR, you are buying 100% American made and finished product