Green Classic & Vintage Spares

Adjustable Dump Valve Single Recirculating (TBV003.20A)

Adjustable Dump Valve Single Recirculating (TBV003.20A)

Regular price £96.00
Regular price £96.00 Sale price £96.00
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TBV003.20A Misc Turbo Dump Valves & Boost Adjusters

Motorsport Adjustable Dump Valve, Single Recirculating Piston (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.
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Model Compatibility

Aston Martin V8 Vantage 1977-1989
Aston Martin DB7 1994-2004
Aston Martin DB9 2004-2016
Audi A3 1996-2018
Audi S3 1999-2018
Audi RS3 2011-2018
Audi A4 1994-2019
Audi S4 1997-2019
Audi RS4 2000-2019
Audi A6 1994-2019
Audi S6 1999-2019
Audi RS6 2002-2019
Audi TT 1998-2019
Audi TTS 2008-2019
Audi TT RS 2009-2019
Bentley Continental GT 2003-2019
Bentley Mulsanne 1980-2019
Bentley Arnage 1998-2009
BMW 1 Series 2004-2019
BMW M2 2016-2019
BMW 3 Series 1975-2019
BMW M3 1985-2019
BMW 5 Series 1972-2019
BMW M5 1984-2019
BMW 6 Series 1976-2019
BMW M6 1983-2019
Ferrari 328 1985-1989
Ferrari 348 1989-1995
Ferrari 360 1999-2005
Ferrari 430 2004-2009
Ferrari 458 2009-2015
Ferrari F430 2004-2009
Ferrari F458 2009-2015
Ferrari F12 Berlinetta 2012-2017
Fiat 500 1957-1975
Fiat 500X 2014-2019
Ford Fiesta 1976-2019
Ford Focus 1998-2019
Ford Mustang 1964-2019
Honda Civic 1972-2019
Honda S2000 1999-2009
Honda NSX 1990-2005
Jaguar E-Type 1961-1975
Jaguar XJ 1968-2019
Jaguar F-Type 2013-2019
Lamborghini Countach 1974-1990
Lamborghini Diablo 1990-2001
Lamborghini Gallardo 2003-2013
Lamborghini Murcielago 2001-2010
Lamborghini Aventador 2011-2019
Lotus Elise 1996-2019
Lotus Exige 2000-2019
Lotus Evora 2009-2019
Maserati Quattroporte 1963-2019
Maserati GranTurismo 2007-2019
Maserati Levante 2016-2019
Mazda MX-5 Miata 1989-2019
McLaren 570S 2015-2019
McLaren 650S 2014-2017
McLaren 720S 2017-2019
Mercedes-Benz A-Class 1997-2019
Mercedes-Benz C-Class 1993-2019
Mercedes-Benz E-Class 1993-2019
Mercedes-Benz S-Class 1972-2019
Mercedes-Benz SL-Class 1954-2019
Mercedes-Benz AMG GT 2014-2019
Mini Cooper 1961-2019
Porsche 911 1963-2019
Porsche Boxster 1996-2019
Porsche Cayman 2005-2019
Porsche Carrera GT 2004-2007
Porsche 928 1977-1995
Porsche 944 1982-1991
Rolls-Royce Silver Shadow 1965-1980
Rolls-Royce Corniche 1971-1995
Rolls-Royce Phantom 1925-2019
Rolls-Royce Ghost 2010-2019
Rolls-Royce Wraith 2013-2019
Rolls-Royce Dawn 2015-2019
Volkswagen Golf 1974-2019
Volkswagen Polo 1975-2019
Volkswagen Scirocco 1974-2018
Volkswagen Jetta 1979-2019
Volkswagen Passat 1973-2019
Volkswagen GTI 1976-2019
Volkswagen R32 200

Part Number

1. OEM part number: TBV003.20A

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

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.

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