RPC 8" Steel Brake Booster Dual Diaphragm

8" Steel Brake Booster, Dual Diaphragm, Rod: 4" L, Firewall Mounting Studs: 3/4" L (Coarse Thread), Master Cylinder Studs: 1-1/8" L, Center-to-Center: 3-3/8", Bolt Hole Pattern: 3.375" x 3.375", Zinc|RPC 8" Steel Brake Booster Dual Diaphragm.