BMP's inline adjustable restrictor valve makes tuning your EFI Arctic Cat easy. Most EFI's come plenty rich from the factory. With the inline restrictor valve you can lower the pressure at wide open to give you more power. The valve goes inline and has a gauge so you can check your fuel pressure. It's an easy way to lean out the top end for more power and more speed. This kit uses different sized main jets that install in the end of the valve to reduce the peak fuel flow. Gauge can be installed on the dash for custom applications with some simple fittings and fuel hose. All components are high quality and comes with stainless clamps. Fits all Arctic Cat EFI Models.