Supertech valve protection. Newly redesigned and now fully CNC machined for a higher quality and more precise finish. Fits: BMW B38 / B48 / B58 - Turbo (3/4/6 cylinder) (2015+) References: Fits inlet valves Supertech valve locks.Newly redesigned and now fully machined on CNC for higher quality and more accurate finish.Fits: BMW B38 / B48 / B58 - Turbo (3/4/6 cylinder) (2015+) References: Fits intake valves