Forged LS Rotating Assembly, Flat Top, 4 Inch Stroke, H-Beam, 24x

Speedway introduces forged LS rotating assemblies, with balance job. Includes new Scat forged crank with 4 inch stroke, Scat ProSport H-beam connecting rods and MAHLE flat top pistons. Cranks are new so they use standard size bearings. All Scat 4340 cranks internally balanced and feature a 24-tooth reluctor wheel for 2005 and prior engines.

All balancing is done with our state-of-the-art Hines balancer by race mechanics with over 30 years of experience!  A kit purchased with the optional balance job will ship in 24-48 hours. These rotating assembly engine rebuild kits may require additional charges for heavy metal.

Kits feature: 

• Scat 4340 Forged Steel Crankshaft    
  
  • Standard size journals
  • Keyway cut for damper
  • Nitride hardened and shot peened
  • 24-tooth reluctor wheel (2005 & prior) engines
  • 4.000 inch stroke
• MAHLE Flat Top PowerPak Pistons 
  • 4032 aluminum alloy construction
  • 4.000" bore pistons available in standard, .005 or .030 sizes
  • C/R 62cc=12.1, 65cc=11.7, 71cc=10.9
  • Piston/Pin Weight: 405 g
    Rod Length: 6.125"     
• Scat Pro Sport H-beam Connecting Rods
  • Double rib cap design for added strength and bearing support
  • Polished and shot peened beams to eliminate stress risers
  • Special hollow doweled cap for specific cap-to-rod alignment
  • 6.125" lengths
  • Weight matched set of 8 rods
• King XP Series Main & Rod Bearings
  
  • Unique tri-metal structure that is 24% harder than any other conventional tri-metal race bearing
  • Offers 15% - 30% greater load capacity than traditional bearings
  • Features an enhanced tri-metal copper lead construction with nickel barrier
  • The unique SecureBond adhesion process for superior stability between the top and intermediate layers
  • A greater rod bearing height improves bearing-to-bore contact, heat transfer, and reduces spin potential at high RPM
• GM LS 403 CID: 4.000" bore x 4.000" stroke