SKU: 37645800304

Dual Piston Blow Off/Dump Valve

Sale price$97.19 Regular price$107.99
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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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4.7 ★★★★★
Based on 18 reviews
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Verified Purchase
Buffy
Waukegan, US
★★★★★ 4
Got this for making omelets
Color: Silver 8Oz (250ml), Color: Silver 8Oz (250ml)
I bought this pitcher/mug mainly for beating eggs when making omelets. It’s a bit smaller than I expected, but it works well for single or double omelets, especially since I usually mix in a few extra ingredients. It did not come with a stirrer, may be it is not included with the 8 Oz mug. I had been using a plastic container before, and this stainless‑steel mug definitely makes a louder noise while stirring, but that’s expected with metal. The mug itself feels well made. Time will tell whether the stainless steel holds up without rusting and whether the handle weld stays strong. The handle is comfortable to grip, and the opening is wide enough to clean with a scour pad. I haven’t put it in the dishwasher yet, but the description says it’s dishwasher‑safe.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 8, 2026
M
Verified Purchase
Mrsblockcolsky
Phoenix, US
★★★★★ 5
Cute and small!
Color: Silver 8Oz (250ml), Color: Silver 8Oz (250ml)
Smaller than I pictured but its Perfect for doing 4-5ozs of milk, easy to clean, good quality.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 30, 2025
D
Verified Purchase
Deena Robinson
Chelsea, US
★★★★★ 5
Cute
Color: Stainless Steel 12Oz
Cute and dainty
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 12, 2026
B
Verified Purchase
BojiBiker
Lexington, US
★★★★★ 5
Great frothing pitcher for home use.
Color: Stainless Steel 20 Oz
Great size and shape for frothing. Well made and very good quality, still in great shape after 3 years of daily use.
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Reviewed in the United States on April 3, 2026
K
Verified Purchase
Kindle Customer
Lake Worth, US
★★★★★ 5
Standard, good deal!
The frother cup is great! It is just as I remember them from my days as a barista. It seems to be standard size, and fits well with my Breville. I definitely need some lessons on steaming milk though!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 22, 2026

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