ATK Chevy LS 408 Short Block 58 Tooth -29cc Dished SP36 Engine

Built with lower compression, the ATK SP36 Chevy LS 408 Short Block 29cc is ideal for turbochargers or superchargers application. Assembled with cast iron engine block, forged 4340 steel connecting rod, forged 4340 steel and forged aluminum piston, this short block is capable to deal with up to 700hp.

Short Block Specification

• Block: GM 6.0L Iron LQ4
  
• Bore/Stroke: 4.030 x 4.000
  
• Displacement: 408 C.I.D.
  
• Crankshaft: Manley 4340 Forged 4.000" Stroker Internally Balanced 58 Tooth
  
• Connecting Rods: Manley 4340 Forged H Beam 6.125" ARP 8740 Bolts
  
• Pistons: Manley 2618 Forged +29cc Dished
  
• Piston Rings: Moly Rings
  
• Compression Ratio: 64cc=9.2:1/66cc=9.0:1/70cc=8.7:1
  
• Camshaft Bearings: Installed & Clocked to OEM Position
  
• Freeze Plugs: Brass Installed & Sealed
  
• Oil Galley Plugs: Installed & Sealed
  
• Weight:285
  

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!