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...ogether through a slight interference fit and with differing frequencies, Pro Series XP Racing Valve Springs are able to prevent valve float and maintain valvetrain stability at engine speeds in ...
...ogether through a slight interference fit and with differing frequencies, Alpha Valve Springs are able to prevent valve float and maintain valvetrain stability at engine speeds in excess of 10,...
... and also using a slight interference fit between the two springs, tuner series valve springs prevent valve float and maintain valvetrain stability at over 10,000 rpms...