ATK Chevy LQ9 Gen IV 408 Stroker Short Block 24 Tooth -10cc Dished SP37-G4 Engine

The ATK SP37-G4 Chevy LQ9 Gen IV 408 Stroker Short Block is a solid foundation for high-performance engines. Fully forged, precisely balanced and blueprinted rotating assembly is perfect for high-powered rides. This stroker short block is designed for naturally aspirated engines.

Short Block Specification

• Block: GM 6.0L Iron Gen IV
  
• Bore/Stroke: 4.030 x 4.000
  
• Displacement: 408 C.I.D.
  
• Crankshaft: Manley 4340 Forged 4.000" Stroker Internally Balanced 24 Tooth
  
• Connecting Rods: Manley 4340 Forged H Beam 6.125" ARP 8740 Bolts
  
• Pistons: Manley 2618 Forged -10cc Dished
  
• Piston Rings: Moly Rings
  
• Compression Ratio: 64cc = 11.2:1 / 68cc = 10.7:1 / 72cc = 10.3:1 (can vary due to deck height/gasket thickness)
  
• 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!