Nameless Wave Spring Bypass Valve (02-07 WRX, 04-21 STI, 04-07 FXT)

Upgrade your Subaru's turbo system with the Nameless Performance Wave Spring Bypass Valve. This recirculating bypass valve (Recirculation Valve, BPV, BOV) plays a crucial role in maintaining optimal performance. When the throttle is closed, it evacuates pressure from the charge circuit, preventing a surge of boost that can impact the compressor wheel's movement. The factory design on the STi often falls short, featuring a large valve face and slow-acting diaphragm, leading to boost leaks under higher-than-stock pressures.

Enter the Nameless Performance Wave Spring Bypass Valve – a game-changer in turbo performance. Engineered to withstand higher pressures, this valve ensures no loss of boost charge when the throttle is open. Its quick-opening design allows the charge circuit to purge rapidly without restriction, resulting in quicker turbocharger re-spool after shifts and deceleration events. This not only improves overall performance but also provides a consistent platform for tuning by preventing boost leaks that can affect peak boost numbers.

The Wave Spring Bypass Valve boasts a unique design that opens incredibly fast, overcoming the trade-off between quick opening and a small cross-sectional flow area. It addresses the issues of the factory valve by delivering reliable performance and preventing boost leaks even under increased pressure. Whether you're already running a pro-tune with a reliable valve or replacing a leaking factory valve, the Nameless Performance Wave Spring Bypass Valve offers a direct replacement. However, if you're replacing a leaking factory valve, it's advisable to consult your tuner for guidance, especially if you're sealing up a leak, which may result in an increase in boost pressure.

Design:

- Piston and wave spring design has no rubber diaphragm to fail or leak boost.  By utilizing a wave spring as the pre-load spring on the piston, Nameless Performance is able to reduce overall package sizing by getting an equivalent seat pressure with a flatter overall compressed design. 

- Stainless hardware throughout, clock able cnc machined banjo fitting, billet piston.  

- 100% Machined and Assembled In-House at Nameless Performance in Woodland, Washington.  

- Patented internal design.