At Kirban Performance, we’ve worked closely with Turbo Buick owners for decades to help keep their vehicles safe, drivable, and authentic to their legacy. One of the most frequently asked questions we get from customers is about the 1987 Buick Grand National brake booster conversion.

The stock Powermaster braking system, while innovative for its time, is notoriously problematic, and it’s often the first system owners want to upgrade. Today, we’re breaking down your three main options: retaining the original Powermaster, converting to a vacuum booster, or going full performance with a Hydro-Boost setup.A

The Problem With the Powermaster

The factory-installed Powermaster brake system used a motor-driven pump to supply brake pressure. While it delivered solid stopping power when it worked, the system was overly complex and prone to failure, often at the worst time. Parts are scarce and expensive, and even rebuilt units don’t always last.

For collectors trying to preserve originality, maintaining the Powermaster might be a necessity. But for drivers who value reliability and safety, converting to a more dependable system is a smart investment.

The Vacuum Booster Conversion – Our Most Recommended Solution 

For most Turbo Regal and Grand National owners, Kirban Performance recommends the vacuum booster conversion. It's affordable, dependable, and much easier to maintain. Our vacuum conversion kit comes complete with the correct brake pedal pin, making installation far smoother than piecing it together yourself. 

Here’s why it’s a great choice:

1. Improved reliability – Fewer electronic components mean less that can go wrong.

2. Factory-like feel – Delivers consistent braking similar to other G-body vehicles.

3. Bolt-on installation – Our kit is designed to fit right into your 1987 Grand National without modifications, using proven OEM-style parts.



We even include proper instructions, and our customer service team is here to support your install.

Hydro-Boost: The High-Performance Option

For owners running high horsepower builds, the Hydro-Boost brake system provides tremendous stopping power using hydraulic pressure from the power steering pump. It’s a great option for drag racers or those with upgraded brake systems (like Baer or Wilwood).

 

Pros:

1. Superior stopping power

2. Compact unit design (ideal for turbo setups)

3. Doesn’t rely on engine vacuum



Cons:

1. More complex installation

2. Requires careful routing of hydraulic lines

3. Costlier than vacuum conversion



While Kirban Performance does not currently offer a Hydro-Boost kit, many of our customers who use these systems still rely on us for critical components like 1987 Buick Grand National parts and upgraded accessories.

Installation Tips from the Pros

If you’re planning to do a 1987 Buick Grand National brake booster conversion, keep these expert tips in mind:

1. Pedal fitment matters – Most DIYers forget the correct pedal pin. Our Kirban kit includes it, so your brake pedal geometry will be correct the first time.

2. Check vacuum supply – Turbo cars don’t always make an ideal vacuum at idle. Be sure your engine has adequate vacuum, or consider adding a vacuum reservoir.

3. Bleed the brakes thoroughly – Any air in the lines can lead to spongy braking. Take your time with this step.

Bonus: Pair with Under-Hood Dress-Up Parts

While you’re improving performance and safety, why not refresh your engine bay with some of our popular accessories? The Buick Grand National turbo shield and GNX turbo heat shield are two of our top-selling under-hood upgrades.

1. Our polished stainless GNX turbo heat shield adds show-quality shine while protecting vital components from heat.

2. These pieces are designed to drop right into place and complement any performance build or restoration.

Kirban Performance – Trusted by Turbo Buick Enthusiasts for Over 30 Years.

At Kirban Performance, we’re committed to helping you get the most out of your Turbo Regal or Grand National. Whether you're looking for 1987 Buick Grand National parts, planning a brake booster conversion, or simply want to dress up your engine bay with a turbo shield or heat shield, we’ve got the parts and the knowledge to support your build.

Visit us today and upgrade your Grand National the right way, with performance, safety, and authenticity in mind.