Adjustable Dump Valve Twin Piston Atmospheric (TBV002.25A)
Adjustable Dump Valve Twin Piston Atmospheric (TBV002.25A)
Motorsport Adjustable Dump Valve Twin Piston Atmospheric (Silver)
Standard Range :- 0.5-1.2 Bar
Uprated Spring Range:- 1.3-3.0 Bar (Supplied in the box)
Available in Red,Black,Blue & Silver
Size Range:- 20,25,34mm
Dump valves are designed to vent unused pressure to atmosphere when the throttle has been released. When accelerating the turbo charger produces positive pressure which is used to supply the engine with large amounts of compressed air. When you lift the accelerator the throttle butterfly is closed and the boost has no escape route, so it backs up through the intercooler and causes back pressure that tries to prevent the turbo from spinning, this is known as compression stall.
By fitting a dump valve every time you release the throttle the excess boost pressure will be released which means a significant reduction in turbo 'lag', contributing towards faster pick up between gear changes. In extreme cases on cars with high revving engines or large turbochargers the shaft within the turbo has been known to snap when no form of dump valve has been used.
Couldn't load pickup availability
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Model Compatibility
Model Compatibility
Aston Martin DB5 1963-1965
Audi A3 1996-2003
Audi A4 1994-2001
Audi A6 1994-2001
Audi S4 1992-1995
Audi TT 1998-2006
Austin-Healey Sprite MkII 1961-1964
Austin-Healey 3000 MkIII 1964-1967
Bentley Continental GT 2003-2010
Bentley Mulsanne 1980-1992
BMW 3 Series E36 1992-1998
BMW 3 Series E46 1998-2006
BMW M3 E36 1992-1999
BMW M3 E46 2000-2006
BMW Z3 1996-2002
BMW Z4 2002-2008
Citroen C2 2003-2009
Citroen C3 2002-2010
Citroen C4 2004-2010
Citroen C5 2001-2010
Ferrari 458 Italia 2009-2015
Fiat 500 2007-2015
Fiat Punto 1999-2010
Ford Escort MkV 1990-1992
Ford Escort MkVI 1992-1995
Ford Escort MkVII 1995-2002
Ford Fiesta MkIV 1995-2002
Ford Fiesta MkV 2002-2008
Ford Focus MkI 1998-2004
Ford Focus MkII 2004-2011
Ford Mondeo MkIII 2000-2007
Ford Mondeo MkIV 2007-2014
Jaguar S-Type 1999-2008
Jaguar X-Type 2001-2009
Jaguar XF 2008-2015
Jaguar XK 2006-2014
Jaguar XKR 2006-2014
Land Rover Range Rover 1994-2002
Land Rover Range Rover Sport 2005-2013
Lotus Elise S1 1996-2001
Lotus Elise S2 2001-2011
Lotus Exige S1 2000-2004
Lotus Exige S2 2004-2011
Maserati GranTurismo 2007-2019
Maserati Quattroporte 2004-2012
McLaren F1 1994-1998
McLaren 12C 2011-2014
Mercedes-Benz A-Class W168 1997-2004
Mercedes-Benz A-Class W169 2004-2012
Mercedes-Benz C-Class W202 1993-2000
Mercedes-Benz C-Class W203 2000-2007
Mercedes-Benz CL-Class C215 1999-2006
Mercedes-Benz CLS-Class W219 2004-2010
Mercedes-Benz E-Class W210 1995-2002
Mercedes-Benz E-Class W211 2002-2009
Mercedes-Benz S-Class W140 1991-1998
Mercedes-Benz S-Class W220 1998-2005
Mercedes-Benz SL-Class R129 1995-2002
Mercedes-Benz SL-Class R230 2001-2011
Mercedes-Benz SLK-Class R170 1996-2004
Mercedes-Benz SLK-Class R171 2004-2011
MG MGF 1995-2002
Mini Cooper 2001-2006
Mini Cooper S 2001-2006
Peugeot 206 1998-2010
Peugeot 307 2001-2008
Peugeot 308 2007-2014
Porsche 911 993 1993-1998
Porsche 911 996 1998-2005
Porsche 911 997 2005-2011
Renault Clio MkII 1998-2005
Renault Clio MkIII 2005-2012
Renault Megane MkII 2002-2009
Renault Megane MkIII 2008-2016
Seat Ibiza MkIII 2002-2008
Seat Ibiza MkIV 2008-2017
Skoda Fabia MkI 1999-2008
Skoda Fabia MkII 2007-2014
Subaru Impreza GD 2000-2007
Subaru Impreza GR 2008-2014
Subaru WRX STI GD 2004-
Part Number
Part Number
1. TBV002.25A
2. Misc Turbo Dump Valves & Boost Adjusters
3. Motorsport Adjustable Dump Valve Twin Piston Atmospheric
4. OEM part number: TBV002.25A
Shipping Information
Shipping Information
Standard shipping with tracking via Royal Mail or Evri for heavier parts:
- £4.99 per order for standard 2-day delivery
- £5.99 per order for Next Day delivery
Most orders are shipped the same business day if ordered before 2pm. We ship Monday through Friday.
If we unexpectedly run out of stock we may have to order your part which can take up to 1 week. We will be in touch in the rare circumstance that there is a delay to your shipment.
Returns Policy
Returns Policy
We want you to be completely happy with your purchase but please do not hesitate to contact us immediately if you have a problem with your order. Please ensure that you consider all the points described on our profile page accessible by clicking our name above the product title.
It is especially important that you take due care to ensure that the part you selected is compatible with your car. If in doubt, we'd prefer that you get in touch via our profile page so we can help you.