SKU: 61773859482

Twin Piston Blow Off Valve with Side Vacuum Nipple

Sale price$137.66 Regular price$152.95
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Description

Twin Piston Blow Off Valve with Side Vacuum NippleWe recommend servicing your valve every 3 years, or 20,000 miles, whichever comes sooner This version of our popular FMDV004 valve has the vacuum connection on the side of the valve which is ideal for those applications where space is restricted. 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

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

This version of our popular FMDV004 valve has the vacuum connection on the side of the valve which is ideal for those applications where space is restricted. 

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.

Fitment Guide: Suitable for most turbo cars with an Air Flow Meter. Dual-Piston Atmospheric Valves and Valve Fitting Kits

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 FMDV004A Valve
1 x Forge Sticker

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

The valve has a port size of 25mm

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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  • Delivery to the USA:
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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: 61773859482

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Lorri
Boise, US
★★★★★ 4
Runs small
Size: 10 Slim, Color: Victory Blue Wash
Great quality but ran small compared to the wider leg version.
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Reviewed in the United States on December 17, 2025
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Kindle Customer
Cuba, US
★★★★★ 5
I am 72 and short.
Size: 16, Color: Blue 2-pack
Fit great and perfect length. One pair twisted after washing. Would still order again
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Reviewed in the United States on May 13, 2026
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Tamara
San Leandro, US
★★★★★ 5
👍🏻
Size: 6, Color: Md Lara Wash
Perfect fit
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Reviewed in the United States on May 17, 2026
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Handy Crafter
West Palm Beach, US
★★★★★ 5
Perfect for school
Size: 5 Slim, Color: Victory Blue Wash
My grandkids love these..comfortable and easy care
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Reviewed in the United States on May 18, 2026
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Tamm
New York, US
★★★★★ 5
Love them!
Size: 7 Slim, Color: Washed Blue
I did but expect these jeans to fit so well and look so nice on my daughter. Hands down the best jeans I’ve purchased for her, much better fit and quality than the other stores! The length is perfect, but it’s a little snug in the waist. Still a great fit with some stretchiness! Great value!
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Reviewed in the United States on July 25, 2025

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