ATK Chevy LQ9 Gen IV 408 Stroker Short Block 24 Tooth Flat Top SP39-G4 Engine

Create a garage-made street beast with this ATK SP39-G4 Chevy LQ9 Gen IV 408 Stroker Short Block. Designed to handle 700 horsepower, it suits high compression ratio engines that run on race gas. This short block comes with fully forged crankshaft, connecting rods and pistons to survive high-powered performance.

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 -4cc Flat Top
  
• Piston Rings: Moly Rings
  
• Compression Ratio: 64cc = 11.9:1 / 68cc = 11.4:1 / 72cc = 11:1 (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!