ATK Chevy LS2 403CI Stroker Short Block -15cc Dished Pistons 58 Tooth SP86 Engine

Made for naturally aspirated engines, the ATK SP86 Chevy LS2 403CI Stroker Short Block has tremendous strength to handle huge power. This short block is assembled with new GM LS2 aluminum block, internally balanced forged crankshaft, forged connecting rods, forged pistons, and sealed freeze plugs for reliable operation.

Engine Specifications:

• Block: New GM LS2 Aluminum
  
• Bore/Stroke: 4.005 x 4.000
  
• Displacement: 403 C.I.D.
  
• Crankshaft: K1 4340 Forged 4.000" Stroke Internally Balanced
  
• Connecting Rods: K1 4340 Forged H Beam with ARP 2000 Bolts
  
• Pistons: Wiseco 2618 Forged -15cc Dished
  
• 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!