OVER Racing TT-Formula RS Full Titanium Exhaust – 2-1 (RS660)

Built for the circuit. Refined for performance.
The OVER Racing TT-Formula RS 2-1 Full Titanium System is engineered to extract maximum performance—delivering aggressive weight reduction, sharp response, and race-ready sound.

Product Overview

Developed in collaboration with Piaggio Japan, this system is purpose-built for the Aprilia RS660, designed to perform where it matters most—on the track.

With a focus on peak power while maintaining mid-range torque, the TT-Formula RS achieves a balance between outright performance and rideability. Its layout is carefully tuned for optimal pipe length, ensuring efficient exhaust flow and a distinctive racing profile.

Specifications

• Type: Full Exhaust System (2-1)
• Exhaust Pipe: Titanium Φ38.1 → Φ45
• Tail Pipe: Titanium Φ60.5
• Silencer: TT-Formula RS (300 mm)

Performance Data

• Noise Level (5500 rpm):
  • Without Baffle: 103 dB
  • With Baffle: 101 dB
• Weight: 3.10 kg (Standard: 8.09 kg)

Fitment

• Aprilia RS 660 (2021+)

Performance Features

• Full titanium construction for extreme weight reduction (~62%)
• Optimised pipe layout for improved exhaust efficiency
• Increased peak power with maintained mid-range torque
• Compact silencer design balancing sound and performance
• Designed to retain bank angle for aggressive cornering

Practical Features

• Oil drain access: Yes
• Oil filter access: Yes
• Pillion compatibility: No

Important Notes

• Racing use only – not road legal
• Specifications may change without notice
• Images may differ from actual product
• Instructions, if included, may be in Japanese

Bushido Motorcycles

On the road, you ride.
On the circuit, you reveal intent.