S&S Cycle 320-0604 | 4-3/8
S&S Cycle 320-0604 | 4-3/8
S&S Cycle 320-0604 | 4-3/8
S&S Cycle 320-0604 | 4-3/8
S&S Cycle 320-0604 | 4-3/8
S&S Cycle 320-0604 | 4-3/8
S&S Cycle 320-0604 | 4-3/8
S&S Cycle 320-0604 | 4-3/8
S&S Cycle 320-0604 | 4-3/8
S&S Cycle 320-0604 | 4-3/8

320-0604 | 4-3/8" Stroke Flywheel with Full Width Rods and balancer gear for M8 Models

$1,995.95
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S&S Cycle 320-0604

The flywheels are the heart of any performance engine and S&S Cycle has been perfecting the art for over six decades. Stronger, more durable, and trued to a spec others can only dream of, the new cranks for the Milwaukee-Eight® platform are the best of the best to build your high performance engine around.

FEATURES & BENEFITS
  • 4-3/8" Stroke (107 or 124ci)
  • Balance Gear installed
  • Heat Treated 4140 Material is harder & more than twice as strong as stock
  • Stronger assembly eliminates need to weld crankpin
  • Capable of higher RPM - More available power!
  • S&S High Strength Connecting Rods are designed with Finite Element Analysis to eliminate weak spots and handle more power!
  • Full width wristpin connecting rods (requires S&S Performance Pistons)
  • Balanced for S&S Performance piston weight (1213g)
  • Perfect for Gear Drive Cams
  • Consistent balance & precision machining
  • Capable of higher RPM – More available power!
Install Instructions Download

FITMENT DISCLAIMER

Fitment information is provided as a general reference only and is not guaranteed for any motorcycle, whether stock or modified. Compatibility may vary by year, model, and individual configuration.

Customers are responsible for verifying fitment prior to purchase. House of Harley-Davidson assumes no liability for purchases made based on incorrect or unverified fitment information.

Please TEXT 414-282-2211 with any questions before ordering, or use the chat below.