Short Ratio Final Drive Honda Civic EG6 / EK4 -Engine B16A2-

Final drive for Honda Civic EG6 y EK4 with B16A2 engine and gearboxes with hydraulic clutch

Applications:

• Civic EG6 / EK4 with B16A2 engine

• Compatible with hydraulic clutch gearboxes, with code YS1 / Y80 / S80 / Y21 / S21 / S4C
  

Ratio:

• 4.785 - 14/67 - 14x67
• 4.928 - 14/69 - 14x69 (High Strength Material and Lightweight Crown Wheel)
• 5.167 - 12/62 - 12x62 (High Strength Material and Lightweight Crown Wheel)

      Crown wheel inner diameter - 110mm

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
• Designed specifically for Renault JC5 gearboxes
• High resistance to shock loads and sustained high-RPM operation
• Suitable for motorsport and high-performance street use