ATK Chevy LM7 383CI Short Block -3cc Flat Top Pistons 24 Tooth SP80 Engine

Made for naturally aspirated application, the ATK Chevy LM7 383CI Short Block can handle up to 700 horsepower. Thanks to the fully forged components, this short block offers a robust foundation to the construction of your high-performance engine.

Engine Specifications:

• Block: GM LM7 5.3L
  
• Bore/Stroke: 3.903 x 4.000
  
• Displacement: 383CI.
  
• Crankshaft: K1 4340 Forged 4.000" Internally Balanced 24 Tooth
  
• Connecting Rods: Scat Premium Pro 4340 Forged I Beam 6.125" ARP 8740 Bolts
  
• Pistons: Wiseco 2618 Forged -3cc Flat Top - Coated Skirts
  
• Piston Rings: Wiseco GFX (Alloy Steel top ring)
  
• 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!