ATK GM Gen III 6.0L 370CI 550HP Base LQ4-LB-1 Engine

The ATK LQ4-LB-1 GM Gen III 6.0L 370CI 550HP Base is a perfect foundation for building a streetable muscle cars. It provides more than 550 horsepower with huge mid- to upper-end power and a noticeable idle. Use of excellent components and expert construction brings reliability and consistency to this crate engine.

Engine Specifications:

• Horsepower: 550+
  
• Torque: 490+
  
• Block: GM 6.0L Iron LQ4 Gen III
  
• Bore/Stroke: 4.030 x 3.622
  
• Year Range: 2001-2007
  
• Displacement: 365CI
  
• Crankshaft: ATK Reground 3.622" Stroke Internally Balanced 24 Tooth
  
• Connecting Rods: Scat 6.125" Forged I Beams with ARP 8740 Bolts
  
• Pistons: Manley 2618 Forged -4cc Flat Top
  
• Piston Rings: Moly Rings
  
• Compression Ratio: 10.0:1 Compression
  
• Camshaft: Hydraulic Roller
  
• Camshaft Specifications: 228/234 @50 .604/.604 112LSA
  
• Camshaft Bearings: Installed & Clocked to OEM Position
  
• Cylinder Heads: New LS3 Aluminum 68cc
  
• Rocker Arms: OE Rocker Arms with trunion upgrade
  
• Oil Galley Plugs: Installed & Sealed
  
• Weight: 412
  

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!