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COBB Tuning LF BPV V2 - High-boost Lightweight Bypass Valve Subaru Forester | WRX 2014-2021
$405.00
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The 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.

Original Spring (uncoated)
  • Free length: 3.5"
  • Rate: 7.4 lbf/in
  • Bench cracking vacuum installed in LF BPV: -5.7 psi
New Spring (yellow)
  • Free length: 2.25"
  • Rate: 40.5 lbf/in
  • Bench cracking vacuum installed in LF BPV: -6.7 psi
Why?
A compact and very lightweight bypass valve that is loaded with features and reliability holds high levels of boost without leaks.

Features:
  • 100% Billet Aluminum Construction
  • 100% O-Ring Sealing
  • 100% Rebuildable if there ever is an o-ring failure
Instructions: CLICK HERE

Fitment:
  • Subaru Forester XT CVT USDM 2014-2018
  • Subaru WRX Sedan CVT USDM 2015-2021
  • Subaru WRX Sedan MT ADM 2015-2021
  • Subaru WRX Sedan MT USDM 2015-2021
Note:
  • This is an updated version of the original 745665 LF BPV that now includes a different internal spring.
Proposition 65

WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Vehicle
2014-2017
Subaru Forester XT
2015-2021
Subaru WRX
Founded in 1999 by Trey Cobb, the company has focused exclusively on enhancing the driving experience by creating ultra-high quality, thoroughly engineered products in a total vehicle-platform approach. COBB's range of products and services has grown from an exclusive Subaru focus, to now include Nissan, Mitsubishi, Mazda, Infiniti, Honda and BMW.
COBB COMPONENT LIMITED WARRANTY

COBB Tuning Products, LLC warrants to the original retail purchaser that all components manufactured by COBB Tuning, or sold under the COBB brand, and purchased directly from COBB Tuning or from an Authorized COBB Tuning dealer hold a 12-month limited warranty from the date of purchase against defects in materials and workmanship ("Limited Warranty"). This Limited Warranty extends only to the original retail purchaser of the component. This Limited Warranty is intended to cover components only when they are used in the manner for which they were originally designed. This Limited Warranty is void on all products found to have been used in racing or off-road applications, of any nature whatsoever, and on all products that show evidence of abuse, lack of proper maintenance, improper installation, misapplications, alteration in any way whatsoever from their original design or negligence in the use of COBB Tuning products. This Limited Warranty does not cover normal maintenance or wear items such as belts, brake pad material, clutch disc friction material, and brake rotors. COBB Tuning accepts no responsibility for any special, incidental, or consequential damages or costs or grievances incurred by failure of a COBB Tuning component, including but not limited to labor and shipping costs. All implied warranties shall be limited in duration to the said 12-month warranty period and shall be limited to the express terms and provisions of this Limited Warranty.

PROCEDURES FOR WARRANTY CLAIMS

In the event a problem occurs with a COBB component, please contact COBB Tuning at 866-922-3059 during our normal business hours. When speaking to a customer representative, you will need to have your invoice number on hand. The following steps will then be followed: 1. COBB representative will determine if product will have to be returned to COBB Tuning for inspection. A RMA number will be given to be placed clearly on the shipping label. 2. The retailer or the customer will ship the component in question back to COBB Tuning, including the original sales receipt and a clear description of the exact problem experienced. It is the responsibility of the retailer or the customer to pay for shipping back to COBB Tuning. 3. If COBB finds the component to be defective and within the warranty period, COBB will repair, replace, or issue credit to the customer at COBB's option. Any repaired or replaced product will be returned to the retailer or customer, freight prepaid via ground or by truck. Please note that no replacement warranty parts can be shipped until original parts are returned to COBB tuning for inspection.

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