SB Chevy Rotating Assembly, 400 Flat Top-2 Valve Relief, 5.7 Rod

Speedway introduces rotating assembly engine rebuild kits, with an optional balance job. Includes 2-pc rear main seal cast steel crank, rods and pistons. Cranks are new so they use standard size bearings.

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.

NOTE: Piston rings are not included and must be purchased separately.

Item Details

Flat top, 2 valve relief
Ring style: A

C/R 58cc=12.6, 64cc=11.7, 76cc=10.3
Piston/Pin Weight: 624 g
Rod Length: 5.7"     

Kits include:

• Speedway Cast Steel Crankshaft
  • Two-piece rear main
  • 80-60-06 cast steel construction
  • Fatigue-resistant with near forged steel endurance
  • Standard size journals
• Speedway 5140 I-Beam Claimer Connecting Rods
  • 5140 heat treated steel
  • Shot peened and magnafluxed
  • 5.7 " length
  • Press pin
  • 646 grams
• KB Signature Series Hypereutectic Claimer Pistons
  • Coated skirts
  • Wrist pin lock rings
  • T-5 hypereutectic construction
  • Can be used with press fit or floating wrist pins

Kits include:

• Speedway Cast Steel Crankshaft
  • Two-piece rear main
  • 80-60-06 cast steel construction
  • Fatigue-resistant with near forged steel endurance
  • Standard size journals
• Speedway 5140 I-Beam Claimer Connecting Rods
  • 5140 heat treated steel
  • Shot peened and magnafluxed
  • 5.7 " length
  • Press pin
  • 646 grams
• KB Signature Series Hypereutectic Claimer Pistons
  • Coated skirts
  • Wrist pin lock rings
  • T-5 hypereutectic construction
  • Can be used with press fit or floating wrist pins