The R107 is the solenoid valve used in all current production Fusion Engines and is backwards compatible with all production engines back to the GEN1. This valve is specifically made for the PolarStar Fusion Engine and has higher wattage coils and tighter seals than an off-the-shelf MAC 33A valve.

• Compatible with all versions and generations of the Fusion Engine.
• 4.7 watt coils provide faster response and operation.
• Tighter seal squeeze for increased reliability.