Twin Cam MVA

A close-up image of a motorcycle engine cylinder head and piston against a black background.

Description:

Our Twin Cam MVA CNC porting service is designed for riders who demand serious performance from their engine. Built with advanced 5-axis CNC technology, this package is ideal for high-performance builds, enhancing airflow, throttle response, and overall horsepower. Whether you’re aiming to dominate the street or push the limits at the track, this upgrade gives your engine the edge it needs.

Featuring oversized stainless steel valves—2.120" intake and 1.620" exhaust—our MVA porting ensures that your engine breathes freely, supporting larger builds and high-output applications. On our flow bench, this porting delivers up to 11.9% more intake airflow and 11.4% more exhaust flow, providing noticeable power gains throughout the RPM range.

Every cylinder head is disassembled, inspected, and precisely machined to meet Ward Performance’s high standards. With a focus on both performance and reliability, this package is engineered to support larger, high-power builds without sacrificing street manners.

    • Complete Disassembly, Inspection, and Cleaning: Each head is prepped for peak performance.

    • Stainless Oversized Valves: 2.120" intake and 1.620" exhaust valves optimize airflow for larger builds.

    • Extensive 5-Axis CNC Porting: Ports are meticulously shaped for maximum intake and exhaust efficiency.

    • Bronze Valve Guides and Viton Seals: High-temp seals and durable guides for long-term reliability.

    • Multi-Radius Competition Valve Job: Ensures smooth airflow across valve seats for optimal efficiency.

    • Surface Re-machining of Gasket Area: Guarantees a perfect seal and peak performance.

    • High-Performance .660" Lift Valve Springs: Built to handle the demands of high-lift cam applications.

    • Typically, this service requires you to send in your existing cylinder heads for modification.

    • For those looking for a quicker option, we offer off-the-shelf core heads that are fully prepared and ready to ship. If you have specific custom needs, we're more than happy to accommodate—just let us know what you're looking for.

    • Still have questions or need help deciding?

    • No worries! We know performance upgrades can be a big decision, and we're here to help.

    • If you're unsure about anything, don't hesitate to reach out to us or visit our FAQ page for more information. We're just a message away and ready to assist!

Order Ready-to-Ship Twin Cam MVA Heads Online
  • A close-up of a metallic component with a brass-colored pin inside a cylindrical chamber and a threaded port nearby.

    Performance Bronze Valve Guides

    High-performance bronze guides are used for durability and precise valve movement.

  • Close-up of a metallic circular object, possibly a part of machinery or plumbing, with a smooth, curved surface and a small opening at the bottom.

    Multi-radius Competition Valve Job

    Ensures a smooth transition from the valve seat to the inner port, maximizing airflow and enhancing performance.

  • Close-up of a small motorcycle engine cylinder head and cooling fins isolated on white background.

    High-lift spring kits (.660" lift)

    High temperature steel engineered for optimal valve control in high-performance applications.

  • Close-up of a machined metallic component with circular recesses and threaded holes, likely a precision mechanical part.

    Re-machining of head combustion chambers

    Ensures perfect sealing and combustion efficiency with your engine setup.

Close-up of a motorcycle engine cylinder head with visible combustion chambers and intake ports.
A close-up of a black, four-stroke engine cylinder with cooling fins, a silver intake port, and a visible piston head against a white background.
A motorcycle engine cylinder with black cooling fins and metallic top and side surfaces.