Valve Spring, Outer

Valve Spring, Outer Valve springs are one of the most critical and overlooked components in your engine. They must be matched to your cam in order for the engine to reach its full potential. Use the only valve springs that will give the recommended spring pressure with the valve both on the seat and at maximum lift. 3C, 3CX, 3D, 520, 520HL, 520M, 525, 530, 530HL, < E504/1404; 270, 272, 472, 702, 704, < 83027 255, 262, 462, 602, 604, < 13804 285, 485, 2100, 4100 (ALL EARLY MODELS)