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SuperTech Dual Valve Spring Kit For Subaru EJ20 EJ25 Turbo - SPRK-TS1015-SU1 FITMENT For Subaru - EJ20 Turbo DOHCFor Subaru - EJ25 Turbo DOHC Description All Supertech valve springs are made with premium Superclean Chrome Silicon Vanadium Steel alloy for higher durability at high rpms. Our valve springs are computer designed to ensure that wire stress levels do not overpass the limits of stress. This combined with our high quality steel alloy enables supertech valve springs to be more durable in...

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