JEGS 631490 power brake booster is the perfect upgrade for your hot rod or custom street machine. The smaller diameter makes fitting it into tight spaces easy, and the chrome finish gives any engine bay that show-quality shine. Whether you're upgrading your stock brake booster or converting your manual brakes to power, this unit is sure to be just what you need.

Mounting Dimensions:

• 5 1/4 in. Mount Face Length
• Mount Bolts are 5/16 in.-20 x 1 1/8 in.
• 3 3/8 in. Bolt Pattern (Firewall Side)
• 3 3/8 in. Center-to-Center Bolt Hole (Master Cylinder Side)
• 4 3/4 in. Long Pedal Rod Extension (3/8 in.-24 Thread)