Replaces standard bypass valve. Full-recirculating valve lets you enjoy OEM volume & operation. Don't lose out on the performance benefits of the Turbosmart BOV. No need to worry about the cracking & leaking plastic valves can incur. Incl boost reference adaptor Turbosmart's new Kompact EVR07 Plumb Back blow-off valve for the Clio RS 200 replaces the Clio's standard plastic bypass valve with a billet aluminium unit, designed with performance in mind. The Plumb Back is a full recirculating valve for OEM-style volume and operation, while still providing all the performance benefits of a Turbosmart BOV. The standard valve can bleed boost, and if you're chasing more power, it will struggle to keep up. The plastic construction means that it becomes brittle over time, and can eventually crack, causing significant boost leaks. Turbosmart's Kompact provides race-bred capability in a bolt-on replacement for the Clio's factory BOV. The Plumb Back is a 100% recirculating BOV, offering quieter operation. A lightweight piston, precisely matched to each individual valve body, ensures excellent response and reliability. Because of the fine tolerance between the piston and bore, the Shortie does not need an O-ring between the body and piston is to seal the BOV. This enhances response, reduces required maintenance and improves long-term durability. The product includes a Turbosmart Boost Reference Adapter, which provides access to a boost reference without any destructive methods, such as tapping into the manifold. This means the modification is completely reversible, imPortant when the time comes to sell your car.