4.85 - 13x63 Final Drive for Suzuki Swift GTi 1.3L Mk1/Mk2

Final Drive for Suzuki Swift GTI MK1 / MK2

Applications:

• Suzuki Swift GTI MK1 (SA413 / AA33S) – 1986 to 1989
  Engine code G13B (1.3L 16v) with 5-speed manual gearbox
• Suzuki Swift GTI MK2 (SF413 / AA34S) – 1989 to 1993
  Engine code G13B (1.3L 16v) with 5-speed manual gearbox

Final Drive Ratio:

• 4.846 – 13/63

Material:

• Manufactured from billet and forged Ni-Cr-Mo steel, providing excellent 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 motorsport and high-performance street applications.

Surface Treatments:

• Advanced surface treatment processes are applied to enhance durability and reliability:
• Sandblasting – Ensures uniform surface finish and optimal preparation
• Shot peening – Increases fatigue strength by inducing compressive surface stresses

Heat Treatments:

To achieve maximum strength and dimensional stability, 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

Technical Notes:

Ring gear internal diameter: 90 mm

Compatibility:

• Fully compatible with Suzuki Swift GTI MK1 / MK2 Torsen (gear-type) LSD using a 90 mm crown wheel

Performance Benefits:

• Increased torque multiplication and improved acceleration
• Designed specifically for Suzuki Swift GTI MK1 and MK2 transmissions
• High resistance to shock loads and sustained high-RPM operation
• Suitable for motorsport and high-performance street use