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COBB Leak Free BPV Subaru STI 2004-2021

Regular price $ 375.00
Shipping calculated at checkout.

Short Description

The COBB LF BPV is a compact, leak-free bypass valve built for fast boost venting, reliable sealing, and maximum throttle response—perfect for high-boost, high-performance builds.

Pickup available at SHOP HQ

Usually ready in 5+ days

Delivery and Shipping

Domestic orders typically arrive within 3-7 business days, while international orders may take 7-14 business days. *Please note that additional time may be required for items that are drop shipped or back-ordered. If an item is out of stock, we will contact you in 3-5 business days with an estimated ETA or alternative product options.

Price Match Guarantee

We strive to offer competitive pricing and will price match qualifying competitors under certain conditions. Learn more here

Description

The COBB LF BPV (Low-Friction Bypass Valve) is the ideal solution for enthusiasts demanding quicker boost response and rock-solid reliability under high-pressure conditions. Designed to fit in tight engine bays and handle serious performance demands, this lightweight bypass valve is optimized for fast actuation, consistent sealing, and effortless integration.

Thanks to a 30% reduction in control volume, the LF BPV vents boost faster than traditional designs, resulting in sharper throttle response and reduced turbo lag. Its low-inertia construction improves actuation speed, while the redesigned o-ring piston seal—now twice as thick—boosts durability and compression performance.

The 360° adjustable banjo-style vacuum port simplifies hose routing and minimizes potential leak points. Combined with an upgraded spring and seal system that delivers 60% more clamping force at peak boost, the COBB LF BPV stays tightly sealed under pressure—without manual adjustment.

Whether you're pushing big power on the street or track, or just want a smoother, more reliable driving experience, the LF BPV delivers fast, efficient, and consistent performance you can count on.

Specifications

Material: CNC-machined aluminum

Fitment: Universal with proper flange or adapter

Design: Low-inertia internals for fast actuation

Control Volume: Reduced by 30% for quicker venting

Vacuum Port: 360° adjustable banjo fitting

Seal: Oversized o-ring piston for improved compression and longevity

Spring System: Upgraded with 60% more clamping force under boost

Weight: Lightweight, compact design for tight engine bays

Boost Handling: Designed for high-boost applications

Installation:
Direct-fit for COBB-supported vehicles, may require adapter for others

Use Case:
Ideal for street, track, and tuned builds

Install Instructions

Cobb Tuning

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