7" CHROME BRAKE BOOSTER This universal booster will bolt up to most street rods, hot rods, and many other vehicles with out a problem. It also offers approximately 20% (some say up to 27%) more stopping power than 8" single diaphragm boosters. The chrome finish is decent. Standard 2 bolt brake master cylinder on top. Has 4 bolts on bottom that mount to the firewall with 3 3/8" spacing. BRAND NEW IN THE BOX!!