TWIN AIR Powerflow Throttle Body Kit - Yamaha YZ250F/450F

This Twin Air powerflow throttle body kit contains:

• One orange inlet tube
• One pin
• Two throttle valves (small and large diameter)
• Two screws

It improves the engine speed, depending on the configuration.

• Configuration 1: increases power and acceleration at low and medium revs.
• Configuration 2: increases power at high revs. (without the orange inlet tube)