SKU: 64371015195

Twin Piston Blow Off Valve with Side Vacuum Nipple

Sale price$113.83 Regular price$126.48
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Ships within 48 hours · Estimated delivery Aug 19 - Aug 24

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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.
  • Except Preorder products are shipped in 48 hours.
  • 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: 64371015195

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Verified Purchase
Lucius Lake
Lowell, US
★★★★★ 5
Right for the price
They fit just right. The car now looks newer.
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Reviewed in the United States on December 15, 2025
G
Verified Purchase
Gentech Labs
Waukegan, US
★★★★★ 5
Great Replacement
The good. A perfect fit for my left turn signal lamp. 2003 BMW 330XI. Works and looks good. Has weather seal. We will see how it stands up to the Florida rain and car washes. The bad: As you can see in the picture the right lens retainer clip came in broken, Probably damaged in shipping. No big deal I just needed the left, I'll probably just super glue it and store it as a spare. Overall I got my moneys worth and I'm happy. Product was as described and arrived on time. I will buy from this seller again.
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Reviewed in the United States on July 8, 2022
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Scott Davis
Cuba, US
★★★★★ 3
Cheap enough to not really worry about
They fade to yellow pretty quickly, and get moisture in them. But they look good at the beginning!
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Reviewed in the United States on March 6, 2026
J
Verified Purchase
Julio Alvarado
Grantham, US
★★★★★ 1
Incorrect bulb fitment
Lense look nice on the vehicle, but the bulb socket do not fit. Very disappointed.
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Reviewed in the United States on October 31, 2025
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Verified Purchase
Brian marte
Lowell, US
★★★★★ 5
E46 corner marker lights
Definitely upgraded the look of the car. Highly recommend.
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Reviewed in the United States on September 25, 2025

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