TUFF Stuff performance brake booster and master cylinder Combos are top-of-the-class high performance pieces that are not only attractive, but also reliable to help get you home safely. These booster and master cylinder Combos are built from hefty cast Iron to exceed OEM specifications and then tested before shipping to provide you with maximum dependability. They come available in natural and triple chrome plate finishes, making your hot rod look good under the hood. TUFF Stuff performance brake booster and master cylinder Combos are assembled, plated, and then polished in-house by Tuff Stuff.