PBU6001 - Under-Dash Brake Pedal Assembly- 8" Dual

Universal Under-Dash Brake Pedal & 8" Dual Power Brake Booster Conversion Kit

Firewall-Mount Power Brakes for Hot Rods, Street Rods & Classic Trucks · Adjustable 7"–13" Pedal Position · 8" Dual Diaphragm Booster · 1" Bore Corvette-Style Master · Part #PBU6001

At a glance:

• ✔ Converts an under-floor master cylinder to a firewall-mount power brake setup
• ✔ Adds power brakes to early cars and trucks that never had them
• ✔ Cut-to-fit 14" pedal bracket fits nearly any firewall and dash combination
• ✔ Five pedal positions: 7", 8-1/2", 10", 11-1/2", or 13" from the firewall
• ✔ 8" dual diaphragm booster for strong power assist
• ✔ 1" bore Corvette-style master with dual reservoirs and ports on both sides
• ✔ Works with disc/drum and drum/drum brake systems
• ✔ Free tech support from real brake guys: 866-601-4455

More Go Deserves More Whoa

The brakes on early hot rods and classic trucks were never designed for a hopped-up flathead, a small block, or today’s traffic. Many early cars still have the master cylinder buried under the floor, where it’s a pain to service and short on leverage. Others never had power brakes at all.

This kit fixes both problems. It moves your master cylinder up to the firewall, adds an 8" dual diaphragm power booster, and hangs a modern pedal under the dash, giving you firm, confident, power-assisted stops and more room for your feet. It’s the ideal foundation for a front disc brake upgrade, and it works just as well in ’40s and ’50s cars and trucks as it does in a pre-war build.

Why Move Your Brakes to the Firewall?

• Easy service: Check fluid and bleed the system from under the hood, not from under the car.
• Power assist: A vacuum booster takes the effort out of every stop.
• More foot room: The hanging pedal frees up floor space in tight hot rod cabins.
• Cleaner look: Route your brake lines inboard or outboard for function or show.

What’s Included

• 8" Dual Diaphragm Power Brake Booster, zinc coated
• 1" Bore Cast Iron Corvette-Style Dual Reservoir Master Cylinder
• Cut-to-Fit Under-Dash Pedal Mounting Bracket, 14" long
• Brake Pedal with Pedal Pad
• Adjustable Pushrod & Clevis
• Adjustable Support Hanging Bracket
• Firewall Plate, drilled for manual and power brake applications

Built to Fit Your Build

Cut-to-fit pedal bracket. The 14" bracket fits larger dash structures as delivered and is easy to shorten for compact installs. Cutting locations are marked for each pedal position.

Five pedal positions. Mount the pedal at 7", 8-1/2", 10", 11-1/2", or 13" from the firewall to line it up comfortably with your gas pedal. Then fine-tune the pedal height with the adjustable pushrod.

8" dual diaphragm booster. Two diaphragms deliver more assist than a single diaphragm booster of the same diameter, in a compact package that fits tighter engine bays.

Corvette-style master cylinder. The 1" bore and dual reservoirs give you split front and rear circuits for modern brake-system safety. Ports on both sides let you plumb your lines whichever way works best: 1/2"-20 for the front circuit and 9/16"-18 for the rear.

Specifications

Fitment

Not sure it’s right for your build? Call us at 866-601-4455. We’ll help you figure it out.

Before You Order: Please Read

Brake System
The master cylinder is set up for disc/drum and drum/drum systems. Running something else? Let us know before ordering.

Engine Vacuum
Vacuum boosters need good engine vacuum to work properly. If you’re running an aggressive cam with low vacuum, plan on adding an electric vacuum pump. Call us if you’re not sure.

Universal Kit
Cutting the pedal bracket and adjusting the pushrod to length are part of a normal install.

Measure First
Check the space under your dash and decide on your pedal position before you start cutting.

⚠️ Installation Notes

• Pick your pedal position: Choose one of the five positions, then cut the bracket at the matching cutting location.
• Support the bracket: Use the adjustable support hanging bracket to secure the end of the pedal bracket under the dash.
• Set pedal height: Adjust the pushrod for the correct pedal height and a little free play.
• Vacuum source: Connect the booster to a manifold vacuum source.
• Master cylinder: Bench bleed the master cylinder before installing it. Use fresh DOT 3 or DOT 4 brake fluid.
• Test drive: Check for leaks and test the brakes at low speed in a safe area before driving.

Complete Your Brake Upgrade

Pair this kit with our front disc brake conversion kits, proportioning valves, residual valves, and brake line kits for a complete, matched system. Call us and we’ll help you put together exactly what your build needs.

Free Tech Support

Every kit comes with free tech support before and after your purchase.

• Call: 866-601-4455
• Monday–Friday, 8:00 AM – 4:00 PM EST
• Limited weekend availability

We’re happy to help make sure this kit is right for your build.

Clean firewall. Power assist. Pedal right where you want it. Order your under-dash power brake kit today!
Questions? Call 866-601-4455