You are looking at the PERRIN Performance Master Cylinder Support. This support brace has been designed to add more reinforcement to your firewall to reduce flexing under hard braking conditions.

Here are the details:

• Machined  from 6061 billet aluminum materials
• Anodized black finish with a white PERRIN logo
• Improves positive brake feel
• Bolts from the brake master cylinder to the driver-side shock tower as a brace to produce a firm pedal feel
• Prevents flexing of the firewall
• Includes hardware and installation tool