Chase Bays Clutch Master Cylinder Adapter - Mazda RX-7 FC / FD

This product is designed for those who need or want to upgrade to a Tilton 0.625" (5/8) or 0.75" (3/4 Larger Bore) Clutch Master Cylinder on their FC3S / FD3S chassis without cutting or drilling their firewall. Some transmission swaps require a larger bore clutch master cylinder and since there isn't a larger FC3S / FD3S one you can swap in, this is the best method. Additionally, this product is much more aesthetically pleasing than the ugly FC3S / FD3S cylinder, the stroke is improved so you get a more precise engagement, and matches our Brake Booster Eliminator if you have it. The black powdercoated firewall plate is made of 0.125" (1/8 or 3.17mm) steel and has the master cylinder mounting studs pressed and welded in. It uses the same thread type as stock, which is M8x1.25. There are a few options but don't let it overwhelm, its ultimately just 3 options:1) Standard option includes just the firewall CMC adapter...you will have to supply the Master Cylinder, the AN adapters, the clevi