Stainless Steel Construction: Both exhaust (XH-426) and intake (NK-842) valves are constructed from high-quality stainless steel for unparalleled durability.Chrome Stems and Hard Tips: Chrome stems and hard tips are incorporated for enhanced longevity and wear resistance.Swirl Polished and Fully Machined: The valves feature swirl polished under head areas and fully machined combustion faces to optimize airflow and combustion efficiency.Variety of Shapes: Choose between Race Master (Straight Stem) and Race Flo shapes to suit your racing engine's specific requirements.Recommended for Alcohol Engines: These valves are the recommended choice for exhaust valves in alcohol engines, ensuring reliable performance even in demanding conditions.
This Part Fits:
| Year | 
Make | 
Model | 
Submodel | 
| 2005-2006 | 
Saab | 
9-2X | 
Aero | 
| 2002-2012 | 
Subaru | 
Impreza | 
WRX | 
| 2006-2007,2010-2012 | 
Subaru | 
Impreza | 
WRX Limited | 
| 2009-2012 | 
Subaru | 
Impreza | 
WRX Premium | 
| 2004-2012 | 
Subaru | 
Impreza | 
WRX STI | 
| 2007,2011-2012 | 
Subaru | 
Impreza | 
WRX STI Limited | 
| 2010 | 
Subaru | 
Impreza | 
WRX STI Special Edition | 
| 2006-2007 | 
Subaru | 
Impreza | 
WRX TR |