Check the listing for details. Universal Firewall Under Dash Brake Pedal Disc Drum Kit 7" Booster Smooth Master. Condition: New. Listed at 228.59 USD. Universal Firewall Under Dash Brake Pedal Disc Drum Kit 7" Booster Smooth Master Descripton: Brand New Universal Firewall mount brake pedal assembly with 7" Brake Booster, Master Cylinder and Chrome Disc/Drum Prop Valve Kit with Pressure Switch. 7" Chrome brake booster with Flat Top Master Cylinder and Black Universal Firewall Mounted Power Brake Pedal & Bracket Kit. This 7" booster is ideal for most small to mid size street rods and customs. 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 Chrome Flat Top style, and features a 1" bore. The ports measure 9/16" and 1/2". Chrome Side Mount Disc/Drum Proportioning Valve Kit This kit is designed for Disc Drum Applications ONLY Firewall mount power brake pedal conversion kit is used to mount the booster and master to a more convenient firewall location. The arm is threaded 1/2"-20 to mount a pedal pad and the pedal arm can be adjusted in 1-1/2" increments (Pedal Pivot Point adjusts to 7", 8-1/2", 10", 11-1/2", and 13" ... total length 14") to get that fit you need for your vehicle Package: Chrome Aluminum Brake Master Cylinder with Smooth Top and 1" Bore7" Single Chrome Booster Chrome Side Mount Disc/Drum Proportioning Valve KitBlack Universal Under Dash Mount Pedal Kit Professional Installation is Highly Recommended. (No Instruction Included)