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STM Tuner Secondary
This product listing does NOT include hard parts
UTV industry
The business end of this heat shield is made our proprietary Inferno™ Mat
WSI CNC Ported Throttle Body | Polaris Pro R BIG INJECTOR STM Tuner Secondary**This modification requires a tune for proper control.** The WSI 68mm ported throttle body offers a 20% increase in area at the throttle plate, and overall an even larger increase as we have greatly modified and smoothed the airpath. As we are always looking for improvements, we noticed the throttle body seemed to be very restrictive. We 3D scanned the factory throttle body, digitized the OEM air path, went to work with MasterCam, found the largest