Evolution Powersports is proud to release our "Vent to Atmosphere" Blow off valve kit. This is not some off the shelf automotive BOV – it has been designed and thoroughly tested by us for smaller displacement turbocharged engines. We have found that many automotive BOV’s are either too big or do not have the spring selection available to make them work correctly. The spring rate and length has been custom made for us and is perfectly matched to the boost pressure of the RZR XP Turbo. The body, cap and piston are made from billet aluminum and then anodized grey for good looks and long life.

Due to the conditions that side by sides are typically used in, and the location of the charge tube by Polaris, it was important to address the possibility of sand/dust ingestion in the split second period of time the valve is open after releasing the charge tube pressure and closing under spring compression. A perfectly fitted pre filter is included in the kit which will keep sand and dust out.

Last but not least is the valve sounds amazing as it is doing its job. Below is a short video which shows the valve in action. The wind noise makes it a little difficult to hear the BOV, but from the drivers seat, it sounds great. Also featured in the video is our MAGNUM exhaust which we believe has the best exhaust note in the industry.

Please note the "Vent to Atmosphere" is not for mud boggers and it is not intended to be submerged. We may make a relocation kit for mud boggers who want a BOV they can hear. Otherwise they are better off using our direct replacement Billet Boost Re circulation Valve (BRV)