WSRD DIY CNC Ported Cylinder Head Rebuild Service & Parts | Polaris Pro R
CNC Porting Lead-Times
All WSRD Cylinder Head Services typically take no longer than 3-5 business days.
Relative to work load, some lead-times may exceed 5 business days.
CNC Porting Lead-Times
All WSRD Cylinder Head Services typically take no longer than 3-5 business days.
Relative to work load, some lead-times may exceed 5 business days.
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.
Stock Port Average Air Flow: 189.8 CFM
WSI CNC Port Average Air Flow: 210.6 CFM
The WSRD CNC Port sees an average of ~11% CFM increase over stock with a peak of 19%.
Stock Port Average Air Flow: 146.2 CFM
WSRD CNC Port Average Air Flow: 158.1 CFM
The WSRD CNC Port sees an average of 8% CFM increase over stock with a peak of ~15%.
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