BMW S63 Lifter Shim Set by Ferrea A91 resulting in efficiency that’s 30

resulting in efficiency that’s 30 percent higher than conventional pumps

Designed specifically for the BMW M50

adding structural rigidity and preventing the block from flexing under high loads

0L offered a unique driving experience

making them the ultimate choice for drag racing

BMW S63 Lifter Shim Set by Ferrea A91 resulting in efficiency that’s 30Ferrea Lifter Shim Set for BMW S63 Engines The Ferrea Racing Lifter Shim Set is engineered to enhance the valvetrain stability of BMW S63 engines, ensuring reliable performance under high RPMs and demanding conditions. These precision shims, installed beneath the stock hydraulic lifters, limit lifter travel to prevent valve float, maintaining optimal engine performance during high boost setups, track days, or racing events. Prevent Valve Float and