The Benefits of the UPP. It replaces stock convoluted rubber piece with restrictive plastic middle section. it is a 1 piece mandrel bend with no disruption to flow. Integrated OEM style mounts for sensor and vacuum lines. Integrated modular flange for various Blow Off Valve mounts including: HKS SSQ, Greddy Type R/S, Tial Sport, TurboXS 34/RFL. Comes with vacuum hose and fittings to install and reconfigure Stock BOV. The kit comes with fittings to disable stock bypass valve integrated onto OEM Turbo.