Descripition: 100% brand new, never been used The booster mounts with a 4-bolt pattern. The 4 bolts are in a perfect square and are 3 3/8" apart (center to center). The master cylinder in this kit is the ball milled Top style, and features a 1" bore and the ports measure 9/16" and 1/2". This master cylinder will work with any drum/drum, disc/drum, or disc/disc setup. It will accept the popular OEM or aftermarket 7" or 8" power brake booster. Professional Installation is Highly Recommended Package including: as pictures show .
