Set 4 Fuel injectors 650cc Fit Subaru Forester 2001 - 2006 Impreza WRX 2.0L 2.5L FLOW TESTED BY KSM Motorsports to confirm the flow rates and system balance via ASNU Machine. SUBARU IMPREZA-WRX (2001-2005) 2.0L, 2.5L **They are a direct plug in replacement for all 2001-2005 and some 2006 Subaru Impreza WRX and Sti, later Sti and some Forester, Liberty, Legacy but may require tuning for best performance. They are an ideal upgrade if you want to achieve more hp at the wheels or if you choose to run a larger turbo or increased boost. Fuel Injectors 16611-AA370, 16611-AA510, 195500-3910 Guaranteed to be within O.E specifications Factory rated at 650cc Flow rate @3bar / 43,5psi Direct fit for Subaru applications with top feed fuel injectors For quality assurance, injectors are flow tested one l