SE Center-Cooled M8 +2MM OVERSIZED (Gen. 2)

A motorcycle engine cylinder head with visible pistons and cooling fins, isolated on a black background.

Description:

Our SE Center-Cooled M8 +2MM CNC Porting service is designed for riders demanding peak performance and superior cooling efficiency. While these heads come equipped from the factory with +2MM oversized valves, we take things further by reshaping the intake and exhaust ports using advanced 5-axis CNC porting to unlock exceptional airflow and combustion efficiency. This package is ideal for both high-compression builds and high-stress riding, delivering the performance gains serious riders demand.

The upgrade features +2MM oversized stainless steel or titanium valves, offering durability for long-term performance or lightweight options for higher RPM potential. Through extensive port refinement and flow testing, this package ensures maximum power gains, sharper throttle response, and a noticeable improvement in overall performance.

At Ward Performance, every head undergoes rigorous testing and precision machining to meet exacting standards. Each valve guide and gasket surface is carefully machined for perfect sealing and optimal performance. With this SE Center-Cooled +2MM CNC Porting package, you can expect a 10% increase in intake airflow and a 5.1% increase in exhaust flow, giving your engine the edge it needs to outperform the competition.

Whether you're chasing track victories or building a high-performance street machine, the SE Center-Cooled M8 +2MM CNC Porting offers a powerful combination of enhanced cooling, airflow, and power. Backed by years of racing expertise and engine development, this upgrade ensures your engine operates at peak performance under the most demanding conditions.

    • +2MM oversized stainless steel or titanium valves: These valves, 2mm larger than standard M8 valves, are available in stainless steel for durability or titanium for lightweight, high-RPM performance.

    • Extensive 5-axis CNC porting: Reshaped and optimized intake and exhaust ports to enhance airflow and power output, delivering noticeable improvements over the stock SE port design.

    • New bronze valve guides: Installed on both intake and exhaust sides to ensure smooth valve movement, increased durability, and excellent heat resistance.

    • Re-machined head gasket surface: Ensures a perfect seal and compatibility with your engine setup, maximizing performance and reliability.

    • High-lift spring kits (.640" lift): Available in both steel and titanium to match your build’s specific needs, ensuring precise valve control even at high RPMs.

    • Precision assembly and testing: Each head is meticulously assembled, inspected, and tested to meet Ward Performance’s high standards for fitment and performance.

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

    • 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!

Start Your Order For +2mm SE Center-Cooled M8 Heads
  • Close-up of a metallic engine cylinder with a brass valve inside, mounted on a black engine part.

    Performance Bronze Valve Guides

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

  • A close-up of a metallic engine cylinder head with two cylinders and brass fittings.

    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 motorcycle engine's cylinder head with visible valve springs and metallic components.

    High-lift spring kits (.640" lift)

    Available in steel or titanium, engineered for optimal valve control in high-performance applications.

  • Close-up of an engine cylinder head with two visible valves and a metallic gasket, parts of the engine block are also visible.

    Re-machining of head gasket surface

    Ensures perfect sealing and compatibility with your engine setup.

Close-up of a metal cylinder head with gold-colored valve seats and ports, mounted on a black engine part.
Close-up of a metal engine cylinder head with four gold-colored valve seats and threaded holes, mounted on a black engine block.
A close-up view of a metal engine cylinder bore with a piston pin inside, viewed from the top.
Close-up of a metallic engine component with cylindrical chambers and a small brass nozzle inside, part of a mechanical system.
A close-up of an engine cylinder head with visible combustion chambers and metallic components.
A close-up view of a head of an internal combustion engine cylinder head displaying four intake or exhaust ports and engine valves.
Close-up of a car engine cylinder head showing four pistons with KPX branding, surrounded by a metallic surface and black gasket material.
A close-up view of a motorcycle engine cylinder head with visible intake ports and valve seats, isolated on a white background.
Automotive engine cylinder head with visible valves, springs, and cooling fins.
Close-up of a black automotive cylinder head with silver valve springs and metal components.
Automotive engine cylinder head with black and silver components and brass fittings.