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Single piston dump valve, black: Ford Sierra/Escort Cosworth (not T25), Fiesta Turbo

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Single piston dump valve, black: Ford Sierra/Escort Cosworth (not T25), Fiesta Turbo
Excl. Tax: £80.85 Incl. Tax: £97.02
Available From Stock


An atmospheric dump or blow-off valve suitable for all turbo cars without an air flow meter. Made from billet alloy and using a single piston, this valve will run faultlessly without the need for attention and eliminates the longevity problems associated with the original diaphragm valves. All Forge Motorsport Single-Piston Valves have been designed and built with the intent of venting 100% of the residual charge air remaining in your forced induction system to the atmosphere at throttle lift.

Forge Motorsport nor any of it’s Authorised Distributors can assume any responsibility for any adverse effects resulting from the installation of this valve onto a vehicle whose engine-management-system, whether factory or aftermarket, is not capable of compensating for the loss of metered air through a vent-to-atmosphere valve such as this.

  • Ford Sierra RS Cosworth 3 door 1986-1987
  • Ford Sierra Cosworth RS500 1987
  • Ford Sierra Sapphire RS Cosworth 2wd 1988-1989
  • Ford Sierra Sapphire RS Cosworth 4wd 1990-1992
  • Ford Escort RS Cosworth 4wd T34 1992-06/1994
  • Ford Fiesta Mk3 RS Turbo 1990-1992
Additional Information

Additional Information

Part No FMDV001GTI-B
Product Group Dump Valves & Fitting Kits
Stock Status Available From Stock
Catalogue 2016 Page Click HERE to view this part on page 61 of our 2016 catalogue
Brand Logo Forge Motorsport
Fits Model Variant Ford Escort Cosworth, Ford Fiesta Mk3 (RS Turbo), Ford Sierra (2WD Cosworth), Ford Sierra (4WD Cosworth)