Air and Fuel› Superchargers, Turbochargers and Components

GrimmSpeed

V2 Bypass Valve

$259.00

SKU: 8985332482354

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The GrimmSpeed V2 Bypass Valve is a performance upgrade designed to improve the reliability and efficiency of your forced-induction system. It is constructed from CNC-machined 6061 aluminum alloy and features a corrosion-resistant anodized finish available in black or red. This valve utilizes an oversized 38mm aluminum piston to quickly dump pressure, ensuring leak-free operation.
Show original supplier description
The GrimmSpeed V2 Bypass Valve is a meticulously engineered upgrade for Subaru WRX, WRX STI, and Legacy GT models. This second iteration bypass valve was redesigned for improved manufacturability, performance, and overall reliability compared to the stock unit. It is constructed from billet 6061 aluminum alloy, anodized in either black or red for corrosion resistance and a stylish appearance. The V2 Bypass Valve features a massive 38mm diameter aluminum piston designed for quick pressure release, which is crucial for maintaining leak-free operation in forced-induction platforms. It also includes Buna-N O-rings for resistance to abrasion and any fluids that may enter the intake system. A swivel fitting is incorporated to accommodate custom setups and ease installation. GrimmSpeed found internal leakage at low boost levels in stock bypass valves and engineered this V2 model to hold double the stock pressure. Installation is straightforward, and the unit is described as a plug-and-play package, with the STI version reusing the factory recirculating elbow for precise alignment. Notably, no tuning or adjustment is required for operation. Applications include the 2008-2014 Subaru WRX, 2015-2021 Subaru WRX, 2004-2021 Subaru WRX STI, and 2005-2009 Subaru Legacy GT. While the product states no tune is required, some users have noted that tuners may make minor adjustments for even better boost holding.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandGrimmSpeed
Part Number8985332482354
CategoryAir and Fuel
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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