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what's the point/meaning of "retro-fit"?




Retro-fit means you are putting a roller lifter into a block that did not have a roller cam from the factory. The retro-fit lifters have link bars to keep them from rotating. If you get hydraulic lifters or lifters with an oil band then run the oil pump with the manifold off and make sure the oil bands don't get exposed which would cause a loss of oil pressure.