Dump valves / Blow off valves

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

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25mm Alloy Dump Valve Blanking Bung

Motorsport Developments

This is a dump valve blanking bung for blanking off pipes that once had a 25mm dump valve fitted.Please note, the actual item may vary slightly from the unit shown in the picture. 

£12.00£10.00 (ex. VAT)
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Forge Ford Sierra Cosworth Cold Side Valve Fitting Kit

Forge

We recommend servicing your valve every 3 years, or 20,000 miles, whichever comes soonerDump/Blow Off Valve Fitting Kit.In The Box:1 x Silicon Straight 1 x 1000mm of 4mm Vacuum Hose2 x 35mm Hose Clamp2 x 70mm Hose Clamp2 x 25mm Blanking Plug6 x Cable Ties1 x 60mm Aluminium T Piece1 x Forge Sticker

£68.35£56.96 (ex. VAT)
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25mm Twin Piston Dump Valve

Motorsport Developments

This is a brand new twin piston dump valve and the same type we fit in house to the majority of cars in our workshop as they are without a doubt the best valve on the market today with a very very low failure and leak rate indeed. This valve is suitable for all boost pressures and is of course fully serviceable.It comes with Motorsport Developments engraved in the top.

£94.80£79.00 (ex. VAT)
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25mm Kompact Plumb Back

Turbosmart

Full recirculating BOV. The Plumb Back system recirculates all excess pressure back into the intake system. Great for enthusiasts not wanting to be noticed but wanting the performance and reliability benefits of a quality BOV.Please note; that for twin-turbo applications, such as the Audi S4 2.7L (B5) 97-01, this will require two valves.

£137.94£114.95 (ex. VAT)

25mm Kompact Plumb Back

Full recirculating BOV. The Plumb Back system recirculates all excess pressure back into the intake system. Great for enthusiasts not wanting to be no...
£137.94
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Forge Turbo Recirculation Valve - 25mm Bosch Diverter Valve Replacement

Forge

This valve is a replacement for the OEM valves under the part numbers; 06A145710N, 06A145710P, 0-280-142-114 , 4441895 (Saab) .Quicker throttle responseReduced turbo lagWorld leading springs for more precise operation and consistencyAll internal and external components have been made in the UKReplaces the weaker plastic valvePistons use heat stabilised Viton O-ringsLubricated with high temperature Mobil1 greaseFully serviceable and rebuildable in minutesUnlike other valves on the market, ours produce no check engine lights (EML)Covered by the unique Forge Lifetime Warranty*The standard factory fitted Bosch valve was and still is prone to failure of the rubber diaphragm inside, leading to a boost leak.20 years ago, Forge Motorsport recognised this common failing and developed an aluminum two piece replacement recirculation valve, utilising an aluminum piston as a replacement for Bosch plastic valve, (originally the FMCL007P). This valve soon became the most copied and imitated in the valve marketplace.The FMDV008 turbo recirculation valve is the result of 25 years of continued experience and engineering expertise. With the reputation for innovating and manufacturing the best automotive valves in the world, you can be certain that there is currently no better replacement valve available. Forge's recirculation valve features a greater flow rate than the OEM Bosch valve, as well as a faster response time, due to its revised design. 10/10, replacement for my stock 1.8t mk4 Golf DV, build quality is over the top  Great bit of kit, well made, easy to service  I bought the FMDV008 and the quality is outstanding from the packaging to the product itself, really is a piece of quality kit, easily fitted with the simple instructions included.... and it really does improve the performance By using the associated service kit (FMDVSK), as seen below, the life of the valve can be extended, and the performance can be maintained. With a lifetime guarantee, you can be sure the valve is reliable for your car.It is fully customisable to fit your application with two uprated springs provided in the kit. Forge Motorsport's improvement on the original valve has a compact design, meaning easy fitment under the engine cover. The valve is assembled with a 25mm side pipe, and the vacuum port on the top of the valve is 6mm in sizeIn The Box:1 x FMDV008 Valve1 x Uprated Yellow Spring1 x Uprated Blue Spring1 x Cable Tie1 x 2.5mm Allen key2 x 35mm Hose Clamps1 x Instruction Booklet1 x Forge StickerComplimentary ProductsBig Gear KnobService KitIntake Pressure Compensation Valve

£152.44£127.03 (ex. VAT)
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25mm Kompact Dual Port

Turbosmart

Dual outlet-type BOV. Dual Port vents both to the atmosphere and back into the air intake. Ports with sequential timing allow quieter operation during normal driving, while getting all the benefits of a vent-to-atmosphere BOV under race conditions. Easily converted to a full atmospheric or full bypass unit by using supplied port blanking plug.Please note; that for twin-turbo applications, such as the Audi S4 2.7L (B5) 97-01, this will require two valves.

£201.54£167.95 (ex. VAT)

25mm Kompact Dual Port

Dual outlet-type BOV. Dual Port vents both to the atmosphere and back into the air intake. Ports with sequential timing allow quieter operation during...
£201.54
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