K-Tuned CMC Reservoir is a direct replacement for S2000 CMC. Machined from 6061 aluminum it offers the same volume as OEM. The double o-ring seal ensures no chance of leak. Set screws lock the reservoir in place once located. The diaphragm allows fluid movement without letting air interact with brake fluid. This is crucial as brake fluid is hygroscopic (absorbs water from the air) which can cause premature clutch fatigue and overheating.