Vforce 4R Valve boxRef : VF00006A / 1009778

Moto Tassinari''s VForce valve gearboxes have been a benchmark for engine tuning specialists for over 10 years. VForce4R valve gearboxes boost engine power and throttle response, by improving intake system efficiency compared with original valves.

Vforce4 features:

• New carbon-fiber valves
• Pre-impregnated valves for improved sealing
• Wider valve box for better air circulation
• Combined flap tail increased by 10.5% to promote and increase overall airflow
• Aerodynamic profile at the end of the gearbox to increase air velocity from external intake ports
• Longer valve stop to progressively reduce end speed, for longer service life
• 15.6% reduction in the frontal area of the central lamella combined with a more aerodynamic profile

Vforce4R features:

• Overmolded rubber on valve tip surface for longer intake valve life
• Manifold, valve box and air deflector are specially designed for the VFVorce4R system