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Balystik nozzles improve speed and strenght of the loading. As the spring is conical, small side goes on nozzle A and large side on nozzle B side.
Following the tests we have made, you can try to take off the CU-003 (small oring for cylinder head) when installing this spring. this spring is so hard that there is no loss of FPS, the sealing is directly made with the nozzle B, resulting less friction without oring, faster and stronger BB chambering.
