High-performance conical single wire valve springFor valve lift to 0.605'' with 1.535''/68 lb installed height, 364 lb at max liftMax 6500 rpmIncludes springs, keepers, top collars, bottom collars, and sealsMade in the USAEU: For valve lift with 4,57 cm/58,97 kg installed height, 147,42 kg at max lift.