SKU: 40217598375

Type RS Valve - Atmospheric

Sale price$157.50 Regular price$175.00
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Description

Type RS Valve - AtmosphericWe recommend servicing your valve every 3 years, or 20,000 miles, whichever comes sooner The Forge RS valve has been specifically designed and engineered to offer extreme flow rate capability, where other valves are just not up to it. Often when engines have been tuned by installing larger turbos or even software upgrades improved turbo response can be acheived by fitting the RS valve which has the greater internal mass air flow specification

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

The Forge RS valve has been specifically designed and engineered to offer extreme flow rate capability, where other valves are just not up to it. Often when engines have been tuned by installing larger turbos or even software upgrades improved turbo response can be acheived by fitting the RS valve which has the greater internal mass air flow specification utilising an amazing 50mm (2") bore.

For fine tuning there is a variable spring preload incorporated and a ratchet type top adjuster that will allow for the positive and precise adjustment that your driving style demands. To ease installation a 360 degree adjustable vacuum hose connector. With a choice of inlet and outlet connections the RS valve can be matched to your engine perfectly. This valve incorporates a unique conical, progressive rate spring that can allow for the retention of boost pressure from 7 to 22 PSI depending on the individual user's application and level of adjustment.

If you are intending on running over 22psi then you will need the uprated spring which is included with the kit. This unique spring design will also allow for unrestricted piston travel and flow volume regardless of the amount of pre-load adjustment added to the spring. Other manufacturers valves using cylindrical springs with adjustable pre-load often experience restricted piston travel and flow volume within the normal range of valve adjustment.

Please note: When configured as a Dual- Piston Atmospheric Valve; 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 Authorized 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.

Please specify valve finish and hose connector diameter

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: 40217598375

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4.4 ★★★★★
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susan
West Palm Beach, US
★★★★★ 5
Comfortable, pretty shirt.
Color: Black, Size: Large, Color: Black, Size: Large
Looks great, soft, made well. I am 194 lbs, 5'6" , bust 34", waist 33" I ordered large and fits good. Stretch 68% polyester, 27% rayon & 5% elastane. Pretty shirt I recommend.
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Reviewed in the United States on May 15, 2026
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Toniann...
Omaha, US
★★★★★ 4
Nice but buttons are small
Color: Blue, Size: Large
Nice fit and comfortable 👌 but the buttons look larger in the photo
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Reviewed in the United States on May 10, 2026
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a customer
Louisville, US
★★★★★ 5
Runs true to size and well made!
Color: Black, Size: Medium
I am very pleased with the size and cut of this top. I hesitated on sizing (at 5'1" and 105 lb) because I like a looser fit and am sometimes given different size recommendations. Many times the tops are too large and must be altered or simply passed on to thrift stores. This shirt in a medium is perfect in its fit, flows nicely. The neckline is not too low, but more like a shirt with a couple of top buttons unbuttoned- no gap. The sleeve length is good for me as my shoulders are a bit narrow. (I checked and no way to remove the stitches that hold the sleeve into a cuff. They are deeply embedded into this soft opaque fabric that has some stretch. (Even with the best of seam rippers and sharp eyesight!)I think the rolled cuff is cute! Top drapes well and is a great length for jeans or shorts- dressy casual wear, with its perfect fabric thickness. I really like the black color. I would not wear it with leggings because of the length, but jeggings are great with it. The little contrasting buttons are a nice touch. Great value buy.
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Reviewed in the United States on May 5, 2026
J
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J.M.D.
Dallas, US
★★★★★ 5
Cool and Comfortable
Color: Army Green, Size: Small
Tops are well made of great fabric. They run true to size. They fit great and are great for summer wear.
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Reviewed in the United States on May 17, 2026
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camping roots
Belleville, US
★★★★★ 5
Super comfy and pretty
Color: Black, Size: X-Large
Fit is nice and comfortable!!! Soft in the inside as well! It’s not huge but also doesn’t stick to me. You can literally wear it down (casual with jeans or shorts) or dress up (like I did for Mother’s Day with a nice skirt and jacket) Seems breathable enough for our California heat
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Reviewed in the United States on May 12, 2026

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