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The Dual Preload Valve System (Dual PVS) suppresses unnecessary damping forces at higher piston speeds
for performance builds where cabin noise levels are not the concern
2002-2014 WRX 2004+ STI The Manley Performance Valve Spring Set has been designed to accommodate high-lift cams
Will work with lifted or raised vehicles
IAG's RockBlocker overlays are pre-cut
IAG Flex Fuel Line Upgrade Kit - 2008-2014 Subaru WRX / 2008-2021 STI Subaru-STI-2004 The Dual Preload Valve SystemIAG Flex Fuel Line Upgrade Kit 2008 2014 Subaru WRX 2008 2021 STI Flex Fuel Line Upgrade for the 2008 2021 Platform The IAG Flex Fuel Line Upgrade Kit for 2008 2014 WRX and 2008 2021 STI applications adds COBB Tuning Flex Fuel Sensor compatibility to an existing IAG fuel line installation. Includes PTFE fuel lines and the sensor mounting hardware needed to integrate the COBB Flex Fuel Sensor into the return line routing. DETAILS Adds COBB Tuning Flex