Want to modify or upgrade your 2008-2014 Subaru Impreza WRX STI with aftermarket valves? At OGTuners.com we have a great selection of aftermarket performance parts for your Subaru Impreza. We have 16 valves parts available in our store with free shipping to the Continental US.
GSC Power Division Exhaust Valves +1mm
 $39.42 2013-01GSC P-D Subaru Subaru EJ205/EJ207/EJ257 Chrome Polished Exhaust Valve - 33mm Head (+1mm) - Single IN STOCK 2004-2014 Subaru Impreza WRX STI |
 $53.25 2017-01GSC P-D Subaru EJ20/EJ257 Turbo Chrome Polished Super Alloy Exhaust Valve - 33mm Head (+1mm) -Single IN STOCK 2004-2014 Subaru Impreza WRX STI |
GSC Power Division Exhaust Valves -STD
 $39.31 2011-01GSC P-D Subaru Subaru EJ205/EJ207/EJ257 Chrome Polished Exhaust Valve - 32mm Head (STD) - Single IN STOCK 2004-2014 Subaru Impreza WRX STI |
 $52.89 2015-01GSC P-D EJ series EJ205/EJ207/EJ257 Chrome Polished Super Alloy Exhaust Valve-32mm Head(STD) IN STOCK 2004-2014 Subaru Impreza WRX STI |
GSC Power Division Intake Valves +1mm
 $39.39 2014-01GSC P-D Subaru EJ205/EJ207/EJ257 Chrome Polished Intake Valve - 37mm Head (+1mm) - Single IN STOCK 2004-2014 Subaru Impreza WRX STI |
GSC Power Division Intake Valves -STD
 $39.26 2012-01GSC P-D Subaru Subaru EJ205/EJ207/EJ257 Chrome Polished Intake Valve - 36mm Head (STD) - Single IN STOCK 2004-2014 Subaru Impreza WRX STI |
Manley Performance Extreme Duty Valves
 $522.23 11137-8Manley 00-03 Subaru WRX (EJ20) / 04 STi Exhaust 32mm Stainless Extreme Duty Valves IN STOCK 2004-2012 Subaru Impreza WRX STI |
 $81.25 11139-1Manley 00-03 Subaru WRX (EJ20) / 04 STi Exhaust 33mm Stainless Extreme Duty Valve (1 valve) IN STOCK (5+) SHIPS FROM MANUFACTURER (Last checked: 11/04/2025) Shipping times vary by Manufacturer (Can take days or weeks, contact us for an ETA) 2004-2012 Subaru Impreza WRX STI |
 $522.23 11139-8Manley 00-03 Subaru WRX (EJ20) / 04 STi Exhaust 33mm Stainless Extreme Duty Valves IN STOCK (5+) SHIPS FROM MANUFACTURER (Last checked: 11/04/2025) Shipping times vary by Manufacturer (Can take days or weeks, contact us for an ETA) 2004-2012 Subaru Impreza WRX STI |
Manley Performance Race Flo Valves
 $44.81 11138-1Manley 00-03 Subaru WRX (EJ20) / 04 STi Intake 36mm Stainless Race Flo Valve (1 valve) IN STOCK (5+) SHIPS FROM MANUFACTURER (Last checked: 11/04/2025) Shipping times vary by Manufacturer (Can take days or weeks, contact us for an ETA) 2004-2012 Subaru Impreza WRX STI |
 $201.09 11138-8Manley 00-03 Subaru WRX (EJ20) / 04 STi Intake 36mm Stainless Race Flo Valves IN STOCK 2004-2012 Subaru Impreza WRX STI |
 $44.81 11140-1Manley 00-03 Subaru WRX (EJ20) / 04 STi Intake 37mm Stainless Race Flo Valve (1 valve) IN STOCK (5+) SHIPS FROM MANUFACTURER (Last checked: 11/04/2025) Shipping times vary by Manufacturer (Can take days or weeks, contact us for an ETA) 2004-2012 Subaru Impreza WRX STI |
 $201.09 11140-8Manley 00-03 Subaru WRX (EJ20) / 04 STi Intake 37mm Stainless Race Flo Valves IN STOCK 2004-2012 Subaru Impreza WRX STI |
Manley Performance Race Master Valves
 $201.09 11155-8Manley 00-03 Subaru WRX (EJ20) / 04 STi Exhaust 32mm Stainless Race Master Valves IN STOCK 2004-2012 Subaru Impreza WRX STI |
 $44.81 11171-1Manley Subaru WRX EJ205/STi EJ257 33mm Race Master Exhaust Valve (Single) IN STOCK (5+) SHIPS FROM MANUFACTURER (Last checked: 11/04/2025) Shipping times vary by Manufacturer (Can take days or weeks, contact us for an ETA) 2004-2011 Subaru Impreza WRX STI |
 $201.09 11171-8Manley Subaru WRX EJ205/STi EJ257 33mm Race Master Exhaust Valves (Set of 8) IN STOCK 2004-2011 Subaru Impreza WRX STI |