ATK GM LM7 347CI 500HP Base LM7-LB-2 Engine

The ATK LM7-LB-2 GM LM7 347CI Engine 500HP Base is designed to rock the streets and the strips. Producing over 500 horsepower with more than 450 ft.lb torque, you will feel like riding a beast down the road. This crate engine is ideal for people who already have their own components.

Engine Specifications:

• Horsepower: 500+
  
• Torque: 450+
  
• Block: LM7 5.3L Gen 3
  
• Bore/Stroke: 3.903 x 3.622
  
• Year Range: 1999-2007
  
• Displacement: 347CI
  
• Crankshaft: OE GM reground 24 tooth reluctor wheel
  
• Connecting Rods: Scat 6.125" Forged I Beams with ARP 8740 Bolts
  
• Pistons: Wiseco 2618 Forged
  
• Piston Rings: Wiseco GFX (Steel top ring)
  
• Compression Ratio: 10.3:1 Compression
  
• Camshaft: Hydraulic Roller
  
• Camshaft Specifications: 228/234 @50 .604/.609 112LSA
  
• Camshaft Bearings: Installed & Clocked to OEM Position
  
• Cylinder Heads: CNC Ported Cathedral Port cores 2.02/1.60, dual valve springs, titanium retainers
  
• 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!