The Revolution Performance 1.9 Twin Cam heads are a product of countless hours of physical research and development to produce not only big torque but reliable, broad power delivery. Ports are developed using state of the art Superflow 600 flowbench technology and port flow analysis software as well as real world know how to bring a perfect union of volume and velocity. What does this mean for the customer? BIG torque! Let's face it, the real world is not full of dyno shootouts where mostly unusable high end horsepower is key. All heads are upgraded to one piece severe duty stainless steel 1.900" intake and 1.615" exhaust valves.

Valve guides are replaced with bronze manganese units for the utmost in durability and heat dissipation along with Viton rubber valve guide seals. Valve springs are replaced with superior quality chromium silicon units with lightweight Titanium retainers and 10 degree valve locks. This is the bench mark cylinder head for early power delivery and excellent “long haul” durability!

You can either send us your heads to be ported (20-2) or we can do a core exchange (1017-603 for black, 1017-606 for silver).

This cylinder head is the “no holds barred” big torque and horsepower piece. If you are looking to build the torque monster of your dreams, big inch cruiser, or high revving street killer then this is the head for you. If the descriptions sound diverse that's because they are. These cylinder heads are prepared for you based upon your exact engine combination so that your performance goals are met. When you are trying to achieve a specific power or characteristic goal an “off the shelf” cylinder head will not do. All components are replaced with the very best that the valve train industry has to offer. Severe duty 2.00" intake valves along with 1.630" high tulip exhaust valves are installed and heights are blueprinted. OEM valve seats are replaced with high quality cast alloy units. Chromium Silicon valve springs are used for the utmost in stability and reliability as well as light weight Titanium retainers and high performance 10 degree valve locks. Lastly, valve guides are replaced with bronze manganese units for unsurpassed heat dissipation.

This cylinder head is the “no holds barred” big torque and horsepower piece. If you are looking to build the torque monster of your dreams, big inch cruiser, or high revving street killer then this is the head for you. If the descriptions sound diverse that's because they are. These cylinder heads are prepared for you based upon your exact engine combination so that your performance goals are met. When you are trying to achieve a specific power or characteristic goal an “off the shelf” cylinder head will not do. All components are replaced with the very best that the valve train industry has to offer. Severe duty 2.00" intake valves along with 1.630" high tulip exhaust valves are installed and heights are blueprinted. OEM valve seats are replaced with high quality cast alloy units. Chromium Silicon valve springs are used for the utmost in stability and reliability as well as light weight Titanium retainers and high performance 10 degree valve locks. Lastly, valve guides are replaced with bronze manganese units for unsurpassed heat dissipation.

You can either send us your heads to be ported (20-2) or we can do a core exchange (1017-603 for black, 1017-606 for natural).

Custom port designs such as 1.800" intake port are available also per your request or should your wicked combination dictate it!

NOTE: We also have extensive experience at porting heads from STD, S&S, and others, and we can provide new castings as needed for all major brands. Please call for details.