Manley Performance 11137-8 Extreme Duty Exhaust Valves for Subaru WRX and STI

Description

Experience exceptional performance with the Manley Performance 11137-8 Extreme Duty Exhaust Valves designed specifically for Subaru WRX and STI models from 2004 to 2007. Crafted with high-quality XtremeAlloy material, these valves are engineered to withstand the extreme heat and force encountered in high-performance applications such as racing and modified street vehicles. The chrome stems and hard tips ensure long-lasting durability, even under rigorous conditions, reducing maintenance and replacement needs.
Optimized for airflow and combustion efficiency, these valves feature swirl polished under head areas and fully machined combustion faces. This meticulous machining improves airflow dynamics, resulting in better engine breathing, increased power output, and enhanced throttle response. Whether you’re upgrading for racing or aiming to improve everyday performance, these valves help unlock your vehicle’s potential.
Designed for a precise fit, the valves are suitable for a range of Subaru WRX and STI models, including the 2004-2007 years. They are ideal for applications where high heat resistance and durability are critical, such as turbocharged engines and high-performance builds. Backed by Manley’s reputation for quality and engineered to meet the demands of demanding automotive enthusiasts, these valves are a reliable choice for your next engine upgrade.

Features:

• Engineered with XtremeAlloy material for maximum heat and force resistance

• Chrome stems and hard tips for increased longevity and wear resistance

• Swirl polished under head areas to enhance airflow and combustion efficiency

• Fully machined combustion faces for precise fit and optimized engine performance

• Designed for high-performance applications including racing and modified street engines

Fitment:
Saab 9-2X Aero 2005
Saab 9-2X Aero 2006
Subaru Impreza WRX 2002
Subaru Impreza WRX 2003
Subaru Impreza WRX 2004
Subaru Impreza WRX 2005
Subaru Impreza WRX 2006
Subaru Impreza WRX 2007
Subaru Impreza WRX 2008
Subaru Impreza WRX 2009
Subaru Impreza WRX 2010
Subaru Impreza WRX 2011
Subaru Impreza WRX 2012
Subaru Impreza WRX Limited 2006
Subaru Impreza WRX Limited 2007
Subaru Impreza WRX Limited 2010
Subaru Impreza WRX Limited 2011
Subaru Impreza WRX Limited 2012
Subaru Impreza WRX Premium 2009
Subaru Impreza WRX Premium 2010
Subaru Impreza WRX Premium 2011
Subaru Impreza WRX Premium 2012
Subaru Impreza WRX STI 2004
Subaru Impreza WRX STI 2005
Subaru Impreza WRX STI 2006
Subaru Impreza WRX STI 2007
Subaru Impreza WRX STI 2008
Subaru Impreza WRX STI 2009
Subaru Impreza WRX STI 2010
Subaru Impreza WRX STI 2011
Subaru Impreza WRX STI 2012
Subaru Impreza WRX STI Limited 2007
Subaru Impreza WRX STI Limited 2011
Subaru Impreza WRX STI Limited 2012
Subaru Impreza WRX STI Special Edition 2010
Subaru Impreza WRX TR 2006
Subaru Impreza WRX TR 2007