ATK Chevy LS3 415 Short Block 58 Tooth -29cc Dished SP74 Engine

Build a powerful engine for your muscle car with the ATK Chevy LS3 415 Short Block. With lower compression ratio, this short block is ideal for turbocharged and supercharged applications. Made from GS aluminum blocks, this unit is fitted with forged crankshaft, forged pistons and forged connecting rods for tough construction.

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 +29cc Flat Dished
  
• Piston Rings: Moly Rings
  
• Compression Ratio: 64cc=9.3:1/66cc=9.1:1/70cc=8.8:1
  
• 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!