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COBB LF Bypass Valve 2002-2007 WRX / 2004-2021 STI / 2006-2008 FXT

SKU 712665
Original price $345.00 - Original price $345.00
Original price
$345.00 - $345.00
Current price $345.00

The C.A.R.B. Certified COBB LF BPV is a compact and lightweight by-pass valve that is capable of holding very high boost pressure without leaking. Its updated design reduces control volume by 30% allowing for extremely fast venting of boost when actuated. Innovative engineering and precision manufacturing result in a compact package able to fit in the confines of a tight engine bay. Due to the low weight of the components, the moving parts in the LF BPV have less inertia and can respond faster than heavier components in other bypass valves. This updated design uses a Banjo-fitting vacuum port which provides 360 degree adjustability of hose routing. This results in a simpler install and less potential leak points than the NPT ports. This new design also includes a piston o-ring seal that is twice the diameter of the old design allowing more seal compression and reduced wear. Adjustability of the spring seat is no longer needed due to the updated spring and seal design which provides a 60% increase in clamping force at peak boost while maintaining similar operation at idle and transient loads.

Customer Reviews

Based on 9 reviews

Easy install and more pull


Thank you for your 5 Star Review of the COBB LF Bypass Valve! We are pleased to hear that the installation process was straightforward for you. It is great to know that you have experienced an improvement in performance with more pull after installing the bypass valve. At Subimods, we aim to provide quality aftermarket Subaru parts to enhance your driving experience! Enjoy!


Tanner Pratt

I paired this with a Grimm speed boost controller and turbo smart waste gate and it sounds amazing. Install was very easy and it came fast. 100% recommend


Thank you for sharing your positive experience with the COBB LF Bypass Valve! It's great to hear that the installation was easy and that you're happy with the sound. Pairing it with other components like the Grimm speed boost controller and turbo smart waste gate are great options! Thank you for your 5 Star Review and added video!


Devin Lee
Great product

Fits perfectly and works great


Thank you for your 5 Star Review of the COBB LF Bypass Valve! I am glad to hear this BPV fits and performs well! Enjoy the added performance!


D Cook
Cobb bpv

Works great sounds great looks great .Nice upgrade.


The COBB LF Bypass Valve is a fantastic upgrade from OEM! The lightweight design ensures faster response and performance! The updated compact design creates for a better fitment and simpler install! Thank you for your 5 Star Review!


Austin Jacob
COBB is the best

Perfect, faster boost build up than my bov since it recirculates the boost rather than dumping to atmosphere. You’ll notice the amazing quality Cobb always has. They are a little bit more money but we’ll worth it !


I couldn't have said it better myself! The fully recirculating valve allows for faster boost response as you said and the design allows this recirculation to happen even faster! The added bonus is, it's CARB Legal! Thank you for the 5 Star Review!


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