ATK Chevy LS3 415 Short Block 58 Tooth Flat Top SP73 Engine

Designed to support high-performance engine, the ATK Chevy LS3 415 Short Block can withstand up to 700 horsepower. It is built over GM aluminum blocks for lightweight yet durable use, while the forged internal components like crankshaft, connecting rods and pistons offer exceptional durability.

Engine Specifications:

• Block: New GM L92/LS3 Aluminum
  
• Bore/Stroke: 4.065 x 4.000
  
• Displacement: 415 C.I.D.
  
• Crankshaft: Manley 4340 Forged 4.000" Stroke Internally Balanced
  
• Connecting Rods: Manley 4340 Forged H Beam 6.125 ARP 8740 Bolts
  
• Pistons: Forged +4cc Flat Top
  
• Piston Rings: Moly Rings
  
• Compression Ratio: 64cc=11.9:1/66cc=11.6:1/70cc=11.1:1
  
• Camshaft Bearings: Installed & Clocked to OEM Position
  
• Freeze Plugs: Brass Installed & Sealed
  
• Oil Galley Plugs: Installed & Sealed
  

Every great build needs a solid foundation! For that reason, we take the hard work out of the picture by selling short blocks that are ready for you to complete yourself. Our GM Short Blocks are most commonly packaged as the engine block assembled with Pistons, Piston Rings and Crankshaft installed.

ATK specializes in muscle. With the highest quality internal parts and Dyno Proven combinations of every engine built, ATK is able to add the most bang for your buck and back it up with an industry leading warranty.

Don't forget the engine paint!