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Green Classic & Vintage Spares

Adjustable Dump Valve Twin Piston Atmospheric (TBV002.34A)

Adjustable Dump Valve Twin Piston Atmospheric (TBV002.34A)

Regular price £137.51
Regular price £137.51 Sale price £137.51
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TBV002.34A Misc Turbo Dump Valves & Boost Adjusters

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.
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Model Compatibility

Audi TT 1998-2006
Audi A3 1996-2003
Audi S3 1998-2003
BMW 3 Series E36 1990-2000
BMW 3 Series E46 1998-2006
BMW 5 Series E34 1988-1996
BMW 5 Series E39 1995-2003
BMW Z3 1995-2002
Ford Escort RS Turbo 1986-1990
Ford Fiesta ST 2004-2008
Ford Focus RS 2002-2003
Ford Focus ST 2005-2011
Ford Sierra RS Cosworth 1986-1992
Ford Escort RS Cosworth 1992-1996
Honda Civic Type R EP3 2001-2006
Honda Integra Type R DC5 2002-2006
Lancia Delta Integrale 1987-1994
Mazda MX-5 NA 1989-1997
Mazda MX-5 NB 1998-2005
Mitsubishi Lancer Evolution IV-IX 1996-2006
Nissan 200SX S13 1988-1994
Nissan 200SX S14 1994-1998
Nissan 300ZX 1989-2000
Peugeot 106 GTI 1996-2003
Peugeot 306 GTI 1996-1999
Renault Clio 172 / 182 1998-2005
Renault Megane 225 2004-2008
Subaru Impreza WRX / STI GC8 1994-2000
Subaru Impreza WRX / STI GD 2001-2007
Vauxhall Astra GSI / VXR 1998-2005
Vauxhall Corsa VXR 2007-2014
Volkswagen Golf MK3 1991-1998
Volkswagen Golf MK4 1997-2005
Volkswagen Golf MK5 GTI 2003-2009
Volkswagen Golf R32 MK4 2002-2005
Volkswagen Golf R32 MK5 2005-2009
Volkswagen Jetta MK3 1992-1998
Volkswagen Jetta MK4 1998-2005
Volkswagen Passat 1996-2005
Volkswagen Scirocco MK3 2008-2017

Part Number

OEM part number: TBV002.34A

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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