This billet reservoir kit was designed to replace the OEM EK Honda Civic, '98+ DC Acura Integra, and 2000-2005 Honda S2000 brake master cylinder plastic reservoir. 

When you have spent so much effort on every little detail of your engine bay why neglect replacing that cheap plastic reservoir?!

This billet replacement reservoir fits snugly into OEM master cylinder with O-rings in the adapter base and secures firmly with stock reservoir hold down bolt.