SKU: 17757832109

Dual Piston Blow Off/Dump Valve

Sale price$95.57 Regular price$106.19
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Ships within 48 hours · Estimated delivery Jul 23 - Jul 28

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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: 17757832109

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4.6 ★★★★★
Based on 22 reviews
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C
Verified Purchase
CLS
Lowell, US
★★★★★ 5
Perfect addition to adding LED lights
Size: 16AWG -10FT 2Pcs
Super easy extension to the led lights
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 4, 2026
M
Verified Purchase
Mike
Bozeman, US
★★★★★ 5
Good product. As ordered
Size: 16AWG -20FT 2Pcs
Just what I needed. Good product
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2026
K
Verified Purchase
Kennneth graves
Birmingham, US
★★★★★ 5
Quality product
Size: 16AWG -20FT 2Pcs
Just what I needed to finish my lights
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 7, 2026
Y
Verified Purchase
You noe im Rite
Battle Creek, US
★★★★★ 5
This is Fine
Size: 16AWG -20FT 2Pcs
Verry nice wire that honestly feels like its 18 gauge wire Nothin more nothin less
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Reviewed in the United States on May 25, 2026
D
Verified Purchase
DC
New York, US
★★★★★ 5
Works good
Size: 16AWG -20FT 2Pcs
I used it to set up some extra pods on the back of my truck, and having that full 20 feet of length made it so much easier to route everything cleanly without having to splice in extra wire. The 16-gauge copper feels heavy-duty and is protected by a thick PVC jacket that seems like it’ll hold up well against heat and the elements. It’s a simple plug-and-play setup that saved me a ton of time, and the connections snap together with a really solid, secure click. If you’re doing a custom lighting build on a larger vehicle or a boat, this kit is a total lifesaver for keeping your wiring looking professional and staying reliable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 20, 2026

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