5.08 / 5.46 / 5.84 / 6.16 / 6.33 Final Drive for Honda EP3/FN2 K20A

Short ratio Final Drives for Honda K-series:

Ratios: 

• 5.08 - 12x61
• 5.46 -  13x71
• 5.846 - 13x76 
• 6.167 - 12x74
• 6.333 -  12x76

Material:

Manufactured from billet and forged Ni-Cr-Mo steel, delivering exceptional mechanical strength, high impact resistance, and long-term durability under high torque and aggressive driving conditions.

Hardness:

• HRC 56–60, ensuring excellent resistance to wear and surface fatigue, even in demanding motorsport applications.

Surface Treatments:

Multiple advanced surface treatment processes are applied to maximize durability and reliability:

• Sandblasting – Ensures uniform surface finish and optimal surface preparation
• Shot peening – Increases fatigue strength by inducing compressive surface stresses
• WPC treatment – Enhances surface hardness, reduces friction, and improves micro-surface durability

Heat Treatments:

To achieve maximum strength, dimensional stability, and service life, the following heat treatments are applied:

• Carburizing – Produces a hard, wear-resistant surface while maintaining a tough core
• Cryogenic treatment – Improves dimensional stability, wear resistance, and long-term gear mesh performance

Performance Benefits:

• Increased torque multiplication and improved acceleration
  
• High resistance to shock loads and sustained high-RPM operation
• Suitable for motorsport and high-performance street use

IMPORTANT NOTE:
Due to the nature of motorsport applications and potential variations between vehicles, minor modifications or adjustments may occasionally be required to ensure proper fitment and installation.