Ferrea Endurance Dual Spring Kit 70lbs - 02-05 WRX EJ20 - KT4018The design and processes on these dual valve springs are optimized to reduce valvetrain harmonics and provide greater stability on high horsepower applications. We use high grade premium super clean PAC alloy materials and maintain tight tolerances for those unique aftermarket cylinder heads. Ferrea Subaru WRX EJ20 Endurance Dual Spring Kit Fitment: 2002: Subaru: Impreza: WRX, 2003: Subaru: Impreza: WRX, 2004: Subaru: Impreza: WRX, 2005: Subaru:
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