Valve Spring Models 1020, 1030, 1040, 1120, 1130, 1140, 1350, 1530, 1550, 1630, 1640, 1750, 1830, 1840, 1850, 1950, 2020, 2030, 2040, 2040S, 2120, 2130, 2140, 2150, 2240, 2250, 2255, 2350, 2355, 2440, 2450, 2550, 2555, 2640, 2650, 2750, 2755, 2850, 2940, 2950, 2955, 3030, 3040, 3050, 3055, 3100, 3120, 3130, 3140, 3150, 3155, 3200, 3210, 3255, 3300, 3310, 3350, 3410, 3640, 3650, 4350, 6010, 6100, 6110, 6200, 6210, 6300, 6310, 6400, 6410, 6506, 6510, 6600, 6610, 6800, 6810, 6900, 6910, 820, 840, 8450, 920, 940