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The Supertech universal valve spring is supplied as a single unit with detailed sizing: outer diameters of 30mm and 21.80mm, a 26mm center bore, and rated spring pressures of 80 lb at 40.4mm and 180 lb at 11.5mm lift per the listing. Intended for applications that match these dimensions and load characteristics, this spring is selected where those specific measurements are required for correct valve-train function.
Supertech Valve Spring Dia 30/21.80mm / 80lb at 40.4mm / 180lb at 11.5mm Lift / CB 26mm - Single
