Pack of 4 Napol Performance Coil Development High Performance Coils for Subaru Baja Forester Impreza STI Legacy Outback Saab 9-2x - Performance Coils Set WRX 2.5L TURBO UF508 Napol Performance Coil development Set of (4) Four high performance Coils for Subaru / Saab 2.5L H4 GAS DOHC Turbocharged Engines STI & Non Direct replacement OEM fitment 2.5L H4 GAS DOHC Turbocharged Engines STI & Non Direct replacement OEM fitment :SAAB 9-2X Aero 06 Ignition H4 2.5L Turbo, SUBARU SUBARU Baja 04-06 H4 2.5L Turbo, SUBARU Forester 06-13 H4 2.5L Turbo,SUBARU Impreza GT 08-13 H4 2.5L Turbo, SUBARU Impreza STi 04-05 H4 2.5L Turbo ONLY*, SUBARU Impreza WRX & STi 06-14 H4 2.5L Turbo, Legacy 05-09 H4 2.5L Turbo, SUBARU Outback 05-09 H4 2.5L Turbo Part is compatible to: 5C1478, E1008, E1067, 52-1799 IC588, 22433-AA460, 22433-AA640 UF-508, UF-567, 22433-AA480, 22433-AA540 22433-AA540, 22433-AA640, FK0186 FK0334 12V Improved Combustion, Increased Ignition Performance, Increased BHP and economy, Improved throttle response and smoothness MEETS OR EXCEED OEM PERFORMANCE, 2 Year Warranty, Brand New Coil / Coils in box.