Your cart
Your cart is empty
Continue shoppingDrawer menu
0Low stock
0In stock, ready to ship
Couldn't load pickup availability
Fast Shipping
Free Returns
Best Deals
Please ship your cylinder head core to the following address:
Whalen's Speed R&D
161 Commercial Avenue,
Paw Paw, Michigan 49079
Take your naturally aspirated, non-turbocharger Polaris Pro R to the next level with the WSI CNC Cylinder Head Porting Services! Please note all WSI CNC Ported Cylinder Head Services REQUIRE the +1mm Intake and Valve option. OEM standard size valves will not fit with this service. Valve Spring and Valve Stem Seal options can be added at an additional cost.