Dump valves / Blow off valves

We carry a good stock of popular Focus RS compressor bypass valves or dump valves and blow off valves as they are known.

Turbosmart BOV Kompact Base O-ring Kit


O-Ring Kit - Suits Turbosmart compressor cover style Kompact Shortie/VAG BOVs This product is compatible with the following vehiclesAPPLICATIONSVehicle MakeVehicle ModelVehicle VariantFromToEngineNotesUniversal

£13.14£10.95 (ex. VAT)

Forge Motorsport Valve Service Kit


For info on how to service your valve, click on the 'Instructions' tab above or visit Forge Motorsport guides hereTo order the correct part, you will need to the know the Forge product code of your valve. This will start with 'FM' and will be located on your original purchase receipt, or on the side of the product box. By servicing your valve/adaptor at regular intervals, you can ensure that your Forge Motorsport product will last a lifetime.Each service kit varies depending on which product you need it for: Valve service kits ONLY contain replacement "O" rings, piston, and grease. Blow off adaptor service kits contain ONLY replacement "O" rings and bolts. The splitter valve service kit contains a replacement brass piston and spring.   Valves that have O-rings situated on the piston will not come with a piston as the wear is on the O-rings rather than the piston itself.Valve Service Kit Instructions 1Valve Tightening Instructions V3 3Please Note: In line with our policy to constantly review, revise, and improve our product range, the appearance of the product you receive may differ from the one advertised. 

£17.54£14.62 (ex. VAT)



When you want no noise, no nonsense just performance!GFB's DV+ diverter valve range offers a direct-fit performance solution for the weak factory diverter valves used on many modern vehicles. By retaining the factory ECU control and recirculating the vented air, the DV+ is a purely performance-orientated product.GFBs DV+ design solves the longevity and boost leaking issues that are common with factory diverter valves, and also changes the operation method to pilot actuation to ensure better performance on stock or modified engines.Furthermore, these benefits wont cost you the Earth! Rather than throwing the entire factory diverter valve system in the bin (like other manufacturers solutions), the DV+ keeps what works and replaces what doesnt. It retains the factory solenoid and ECU control to ensure simple installation and reliable operation.10% faster opening, 50% faster closing than the factory diverterRetains the factory solenoid for seamless integrationReplaces plastic valve parts with metal for reliability and strength on stock or modified enginesDirect-fit replacement with GFBs TMS benefitsExclusive pilot-actuated valve mechanism for rapid response at high boost

£129.16£107.63 (ex. VAT)



If you want sound with your performance (or performance with your sound!), GFBs VTA delivers just that! By combining the proven performance benefits of our ground-breaking DV+ with atmosphere venting, the VTA delivers an aggressive blow-off sound, improved throttle response and boost recovery, as well as superior boost holding and reliability in extreme conditions.The factory diverter valve found on these cars has two distinct issues reliability, and performance. Oh yeah, it also doesnt make any noise!Heres how the VTA addresses these problems.Reliability There are two ways in which the factory diverter valve can fail; the un-reinforced rubber diaphragm can rupture, and the metal valve stem that slides in the plastic cap can stick. In both cases, there is a risk to the turbocharger, as the ECU will attempt to compensate for a boost leak by increasing the wastegate duty cycle, which increases the turbo RPM significantly.The VTA features CNC machined billet components that last a lifetime and cannot be damaged by high boost pressures or the associated increased charge temperatures.Performance The factory diverter valve typically operates in only two states either fully open, or fully closed. When it opens at low boost, or during a partial throttle lift mid-corner, it causes increased lag and a noticeably non-linear boost transition, which is noticeable as a distinct step down in power as you roll off the throttle and the valve opens.The VTA however allows the piston to open and close progressively in response to the amount of boost pressure present, so it only vents enough air to prevent compressor surge (the primary purpose of a diverter or blow off valve). This helps to smooth out boost transitions, making the throttle response more linear and predictable, and also minimizes lag introduced by the factory diverter valve.Sound The VTA, as its name suggests, vents the air to atmosphere for maximum whoosh noise when you lift off the throttle. On the Focus RS, there is no MAF sensor and hence no drivability or fuelling issues when venting to atmosphere.

£155.23£129.36 (ex. VAT)

Forge Recirculation Valve for Ford Focus RS MK3 & Vauxhall Adam, Astra, Corsa, and more


We recommend servicing your valve every 3 years, or 20,000 miles, whichever comes soonerThis is a piston design recirculation valve that is a direct replacement for the original fitment. This valve gives greater longevity than the diaphragm (OEM) valves but also benefits from its ability to be fitted with different springs when the boost pressure has been increasded or the engine has been modified. In The Box:1 x FMDVCS14R Valve1 x Uprated Yellow Spring1 x Forge Sticker

£161.68£134.73 (ex. VAT)

Forge Blow Off Valve for Ford Focus RS MK3 & Vauxhall Adam, Astra, Corsa, and more


We recommend servicing your valve every 3 years, or 20,000 miles, whichever comes soonerThis is a piston design bypass valve that is a direct replacement for the original fitment. This valve gives greater longevity than the diaphragm (OEM) valves but also benefits from its ability to be fitted with different springs when the boost pressure has been increased or the engine has been modified.Please note that if your vehicle has the valve show in Figure 1 then this valve will fit your application, however the valve shown in figure 2 will not be compatible with the Forge valve. We have seen this change on vehicles that are produced post 2016 so please make sure to check before you purchase your Forge valve.*To avoid the possibility of a P0101 trouble code, the ECM must be reprogrammed with a tune optimised for atmospheric discharge.In The Box:1 x FMDVCS14A Valve1 x Uprated Yellow Spring1 x Forge Sticker

£161.68£134.73 (ex. VAT)

Turbosmart Kompact Dual Port Blow Off Valve - Ford Focus RS (2016)


TS-0203-1264 (silent)TS-0203-1064 (Hiss)The Turbosmart Kompact Shortie VR08 suits the 2016 Ford Focus RS. This easy-to-install replacement for the fragile plastic OEM blow-off valve offers improved turbo response and reduced compressor surge.The Dual Port is a 50-50 recirculation/vent-to-atmosphere valve for that classic vent-to-atmosphere sound at high boost, and quiet operation at low boost. The Kompact Shortie Blow-Off Valve for the Focus RS has been developed with the Focus high boost pressure in mind, with the goal to improve performance and durability. Plastic OEM blow-off valves like those on the RS have a track record of failures they leak, and they become brittle with age until they eventually crack, causing serious problems. Producing around 23 PSI of boost pressure in standard form, the Focus is already pushing the boundaries of its standard plastic blow-off valve and theres not much room to turn the boost up before the standard valve will struggle to keep up.Turbosmarts Kompact Shortie is constructed of billet aluminium, rather than plastic. Its brass piston is both strong and light, and each BOV is individually matched with the right piston to ensure the best fit, meaning theres no need for an O-ring to seal the body against the piston. This gives the Shortie unsurpassed durability and responsiveness, with less maintenance required than aftermarket BOVs that use piston sealing O-rings.The Kompact Shortie for the Focus RS can be had in both Dual Port and Plumb Back versions. The Plumb Back is a fully recirculating blow-off valve that offers a similar sound volume to the standard valve, so you can have all the performance of a Turbosmart blow-off valve, while flying under the radar. The Dual Port features a split operation between recirculating and venting to atmosphere, providing quiet operation at low boost, and head-turning vent-to-atmosphere sound at high boost a great complement to the Focuss rally fighter character. The Kompact Shortie for the Focus RS features enlarged ports compared to previous Shorties, giving the RS the flow it needs.These direct replacement blow-off valves offer an easy performance improvement without the need for custom fabrication or special tools. Its yet another addition to Turbosmarts ever expanding range of parts for Fords latest EcoBoost range of vehicles.

£182.34£151.95 (ex. VAT)