2009-2026 Yamaha YFZ450R DEL WEST +1.0mm Oversize Titanium Valve Kit and Ferrea Springs

Description

2009-2026 Yamaha YFZ450R DEL WEST +1.0mm Oversize Titanium Valve Kit and Ferrea Springs

Maximize the performance of your Yamaha YFZ450R with cutting-edge DEL WEST +1.0mm oversize titanium exhaust and intake valves, paired with a high-performance Ferrea Spring Kit. This all-in-one kit significantly enhances engine airflow, addressing the limitations of stock valve sizes for superior performance. This a must have combo for racers and trail riders looking for increased power from idle to redline. This is a proven combo!

Key Features:

• Oversized Valves:
  • Exhaust Valves: 29.0mm (+1.0mm over OEM)
  • Intake Valves: 28.0mm (+1.0mm over OEM)
• Performance Focused: Oversize valves significantly improve air intake and exhaust flow, allowing optimal breathing and efficient scavenging for maximum power. The included Ferrea Spring Kit supports the installation of high-performance racing cams while guaranteeing precise valve operation and control for improved valvetrain durability.
• Precision Engineering: These parts being manufactured in the USA ensures exceptional quality and reliability under extreme racing conditions.
• Compatibility: Requires valve seats to be recut to fit the larger diameter valves and is compatible with the stock steel valve seats. For the best results, we recommend upgrading to beryllium copper (BeCu) or Moldstar seat materials to optimize performance and durability but no required.

Additional Recommendations: For best results, this valve kit is recommended for use with a professionally ported cylinder head.