Brand new Hybrid Performance clutch master cylinder adapter for the S-chassis (89-98 240SX). CNC machined in the USA from 6061-T6 billet aluminum. Adapts the OEM S-chassis clutch master pattern to accept a 3/4" style or similar master cylinder. Features a countersunk pocket perfectly shaped to fit the popular 3/4” master cylinder commonly used with LS and other engine/transmission swaps on the S-chassis platform. Perfect for all types of swaps requiring a larger clutch master cylinder than the stock unit. Please note: this item will not work with GS style master cylinders