Quick view Chase Bays Chase Bays Clutch Master Cylinder Adapter - Nissan 240sx S13 / S14 / S15 This product is designed for those who need or want to upgrade to a Wilwood 3/4 aka 0.75" Larger Bore Clutch Master Cylinder on their S chassis without cutting or drilling their firewall. Some transmission swaps require a larger bore... As low as €70,58 Choose Options