5-Speed Close-Ratio Synchro Gear Set – Toyota/PSA C550/C551 (Aygo/107/C1)

5-Speed Close-Ratio Synchro Gear Set – Toyota/PSA C550 & C551

Close-ratio synchromesh gear kit developed for Aygo Cup competition. Fits Toyota C550/C551 gearboxes found in Toyota Aygo/Yaris and PSA platform cars such as Peugeot 107/108 and Citroën C1.

Gear ratios

• 1st: 2.78 (39/14)
• 2nd: 1.94 (33/17)
• 3rd: 1.47 (28/19)
• 4th: 1.20 (29/24)
• 5th: 1.06 (31/29)

Technical specifications

• Billet & forged Ni-Cr-Mo steel
• Hardness: HRC 56–60
• Surface: sandblasting, shot peening, WPC (on request)
• Heat treatments: carburizing & cryogenic

Key benefits

• Optimised close ratios for improved acceleration
• High durability for rally & circuit use
• Proven in competition with excellent reliability