Besides the noise, why else upgrade the stock Subaru bypass valve? The stock unit is known for leaking and having inconsistent boost pressure that will prevent your Subaru 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.
- 2002,2003,2004,2005,2006,2007 WRX
- 2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014 STi
- 2006,2007,2008 Forester XT
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.