Description
The Turbosmart Kompact Plumb Back Diverter Valve is a high-performance, direct-fit replacement for the factory plastic bypass valve found on the Honda Civic Type R. Specifically engineered for the modern VTEC Turbo engines in the FK2, FK8, and FL5 generations, this unit solves the common issues of boost leakage and structural failure associated with the stock internal components.
Unlike a "Blow-Off Valve" that vents to the atmosphere, the Plumb Back configuration recirculates all excess pressure back into the intake system. This ensures quiet operation and maintains the factory-intended airflow logic, preventing "rich" conditions and ensuring the ECU remains perfectly happy—making it the ideal choice for a daily-driven sleeper or a dedicated track car.
Key Performance Benefits
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Reliable Boost Control: Capable of handling significantly higher boost levels than the factory unit without leaking, ensuring you get every pound of boost to the combustion chamber.
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Faster Response: The precision-machined piston design provides quicker actuation, leading to better throttle response between gear shifts and reduced turbo lag.
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Aerospace-Grade Construction: Manufactured from full billet CNC aluminum, offering superior strength over the OEM plastic unit which is prone to cracking and fatigue under high heat.
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High-Temperature Seals: Equipped with specialized seals designed to withstand the extreme under-hood temperatures generated by high-output turbocharged K20C engines.
Engineering & Quality
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Direct Fit Upgrade: Designed to bolt directly onto the factory turbocharger location with no modifications or adapters required.
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In-House Validation: Every unit is manufactured, hand-assembled, and rigorously tested at Turbosmart HQ to ensure perfect operation out of the box.
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Anodized Finish: Features a sleek, corrosion-resistant anodized black finish that looks as good as it performs.
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Stealth Operation: Because it recirculates air (Plumb Back), it maintains a factory-quiet sound profile while providing aftermarket-level durability.
Specifications at a Glance
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Applications: Honda Civic Type R (FK2, FK8, and FL5 models)
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Material: CNC Billet Aluminum
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Configuration: 100% Recirculating (Plumb Back)
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Hardware: Includes all necessary gaskets/O-rings for installation
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Finish: Anodized Black
Why Upgrade?
The factory Honda diverter valve utilizes a plastic diaphragm that can perish or stretch over time, especially if you have installed a tuning chip or ECU reflash to increase boost. The Turbosmart Kompact unit uses a pressure-balanced piston that is virtually bulletproof, ensuring your boost remains consistent for the life of the vehicle.
Installation Note
This is a direct-fit component that utilizes the factory vacuum source. Installation can typically be completed with basic hand tools. To maintain peak performance, we recommend a periodic inspection of the piston and a light application of high-temperature lubricant if necessary, though the aerospace-grade seals are designed for long-term, maintenance-free operation under most conditions.
