ATK Chevy 350CI Engine 375HP Mid Dress HP89M

Built for power, the ATK HP89M Chevy 350CI Engine 390HP Mid Dress is a perfect choice for muscle cars and trucks. It is hand assembled and balanced by experts to deliver a reliable and consistent performance for years to come. It delivers 390 horsepower and 420 ft.lb torque that is sure to make a lasting impression on the streets.

Engine Specifications:

• Horsepower: 390
  
• Torque: 420 lbs./ft.
  
• Block: OE roller block 4 bolt main 1pc seal 1996-2000
  
• Bore/Stroke: 4.040 x 3.480
  
• Displacement: 350 C.I.D.
  
• Crankshaft: OE Reground external balance rear of the crank/internal balance front of the crank
  
• Connecting Rods: OE Powder Metal 5.700" Stock Bolts
  
• Pistons: Hypereutectic 10:1 Compression
  
• Piston Rings: Moly Rings
  
• Compression Ratio: 10.1:1 Compression
  
• Camshaft: Hydraulic Roller
  
• Camshaft Specifications: 220/224 @050 .528in/.536ex 112LSA
  
• Camshaft Bearings: Installed & Clocked to OEM Position
  
• Cylinder Heads: ATK High Performance aluminum with 2.020 in. /1.600 ex. valves
  
• Freeze Plugs: Brass Installed & Sealed
  
• Rocker Arms: Billet Aluminum Full Roller 1.6 Ratio
  
• Oil Galley Plugs: Installed & Sealed
  
• Oil Pan: Rear sump 5qt (not for Chevelles with steering behind crossmember, some corvettes and 62-67 chevy II’s)
  
• Weight: 375
  

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!