M8 +2MM OVERSIZED (Gen. 1)
Level up your Milwaukee-Eight heads with +2mm CNC porting. Precision 5-axis work, +2mm stainless valves, bronze seats, and optional chamber mods deliver up to +19.8% intake and +32.5% exhaust flow for stronger power and throttle response.
Our M8 +2MM CNC Porting service is tailored for riders seeking exceptional performance gains. Leveraging advanced 5-axis CNC technology, this service provides precision-engineered porting that significantly enhances both airflow and combustion efficiency. The +2MM oversized stainless steel valves, paired with optional bronze intake and exhaust seats, offer durability and a high level of performance. We also provide various CNC combustion chamber modifications, allowing for customized options that optimize power output to suit your specific build.
At Ward Performance, every head undergoes meticulous testing to ensure perfect fitment and performance, with each valve seat, guide, and gasket surface machined to precise tolerances for optimal sealing. Along with high-performance spring options, our +2MM porting offers up to a 19.8% increase in intake airflow and a 32.5% increase in exhaust flow—delivering noticeable improvements in power and throttle response that are ideal for riders looking to push their build even further.
Whether you're aiming for more power on the track or enhanced performance for street riding, our M8 +2MM porting provides a potent upgrade backed by years of experience in racing and engine development.
Starting at $2,694.06
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+2MM oversized stainless steel valves: Larger than the +1MM option, these provide even more airflow for superior performance.
Extensive 5-axis CNC porting: Optimized for improved intake and exhaust flow, designed specifically for the +2MM valve upgrade.
Multi-radius competition valve job: Ensures a smooth transition from the valve seat to the inner port, maximizing airflow and overall performance.
Performance bronze intake and exhaust valve seats: Offers increased durability and heat resistance, perfect for high-performance builds.
Available CNC combustion chamber modifications: Options to further customize chamber volumes for specific builds and power requirements.
Re-machining of head gasket surface: Ensures a perfect seal and compatibility with your engine setup.
High-lift spring kits (.640" lift): Available in steel or titanium, engineered to handle the increased demands of the +2MM porting.
Precision-assembled and tested for optimal performance: Each head is fully assembled and tested to meet Ward Performance’s high standards.
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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.
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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!
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Performance Bronze Valve Guides
High-performance bronze guides are used for durability and precise valve movement.
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Multi-radius Competition Valve Job
Ensures a smooth transition from the valve seat to the inner port, maximizing airflow and enhancing performance.
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High-lift spring kits (.640" lift)
Available in steel or titanium, engineered for optimal valve control in high-performance applications.
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Re-machining of head gasket surface
Ensures perfect sealing and compatibility with your engine setup.
