Besides the noise, why else upgrade the stock WRX bypass valve? The stock unit is known for leaking and having inconsistent boost pressure that will prevent your WRX to perform at its best. Moreover the GFB BOV can return the engine to peak boost up to 30% faster than the stock unit when shifting gears.
Overall its a great mod to have for optimal performance.
- 2008, 2009, 2010, 2011, 2012, 2013, 2014 WRX
- 2005, 2006, 2007, 2008, 2009 Legacy GT
Fully Adjustable from Atmospheric to Recirculated.
Most items may be returned within 30 days of the product arriving to your house or place of work. Returns will NOT be accepted on final sales, special orders, opened, installed, incomplete, or otherwise used products. In order to initiate a return, an RMA number must be requested and approved. All returns will be subject to a 15% restocking fee minus complete shipping cost. For complete details on our return policy, please see our Help and FAQ link under HELPFUL INFO.