Dual Piston Blow Off/Dump Valve
SKU: 37645800304

Dual Piston Blow Off/Dump Valve

Sale price$97.19 Regular price$107.99
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Ships within 48 hours · Estimated delivery Jul 6 - Jul 11

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Description

Dual Piston Blow Off/Dump ValveSuitable for most turbo cars with an Air Flow Meter. Made from billet aluminium, this atmospheric diverter valve dumps the charge air to atmosphere creating the "Whoosh" sound when the throttle is lifted. This increases both quicker throttle response and higher clamping load to maintain boost pressure more reliably. Unlike single piston or diaphragm diverter valves, this uses counter balanced springs and dual pistons to prevent the valve from leaking

Suitable for most turbo cars with an Air Flow Meter. 

Made from billet aluminium, this atmospheric diverter valve dumps the charge-air to atmosphere creating the "Whoosh" sound when the throttle is lifted. This increases both quicker throttle response and higher clamping load to maintain boost pressure more reliably. Unlike single piston or diaphragm diverter valves, this uses counter balanced springs and dual pistons to prevent the valve from leaking air into the intake system at idle. This prevents our diverter valves suffering any of the failures associated with single piston and diaphragm type diverter valves.

All Forge Motorsport Dual-Piston Atmospheric 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. While we have incorporated many elements into the design of the Dual-Piston valves to aid in their compatibility with mass air-flow sensor equipped vehicles, we cannot always guarantee that each individual’s application will be compatible with a valve that vents the charge air into the atmosphere.

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.

 

In The Box:
1 x FMDV004 Valve
1 x Forge Sticker

If you wish to tune this product to fit the needs of your engine, please see the spring tuning kits below.

The valve has a port size of 25mm

We recommend servicing your valve every 3 years, or 20,000 miles, whichever comes sooner

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 37645800304

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Truc Phan
Belleville, US
★★★★★ 5
Pretty
Color: Beige
I lovee it. Makes my jewelry looks fancy and easy to assemble.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026
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Dinorah
Carnegie, US
★★★★★ 4
Un poco débil
Color: Beige
Bonito pero su estructura un poco débil, es cartón
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Reviewed in the United States on April 2, 2026
A
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Axelsmom
Alexandria, US
★★★★★ 5
Bracelet organizer
Color: Beige, Color: Beige
Came packaged well. Took about 8 minutes to assemble. The quality of the jewelry holder is very nice and seems to be strong enough to hold my favorite bracelets. I love being ale to organize and visualize all of my choices for the day. Highly recommend this organizer.
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Reviewed in the United States on March 21, 2026
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Fiona
Dallas, US
★★★★★ 5
I love it so cute
Color: Beige, Color: Beige
Easy to install, convenient to use, and the color is really nice too. The size is just what I needed, I love it
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Reviewed in the United States on March 1, 2026
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victoria caraveo
Lexington, US
★★★★★ 1
Cheap product!! Not recommended!
Color: Beige
Do not recommend!! If I could give it zero stars I would. This is made of the cheapest material, once you assemble it the tiers don’t stop spinning , even after screwing the screw at the tightest possible.
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Reviewed in the United States on May 10, 2026

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