Aeroflow GM 8″ Dual Diaphragm Vacuum Brake Booster (Black) | AF300-106BLK

Upgrade your vehicle’s stopping power and reclaim vital under-bonnet space with the Aeroflow Performance GM 8-inch Dual Diaphragm Brake Booster.

If you are experiencing a spongy pedal, pushing the brake to the floor, or have lost vacuum assist, it’s time to replace your failing unit. This high-performance booster is engineered to upgrade manual or factory brake systems, providing exceptional braking assistance with minimal pedal effort.

Why choose an 8-inch Dual Diaphragm Booster?

Because of its compact 8-inch outer diameter, this unit is a popular choice for performance engine builds and V8 swaps. Rather than using a single, bulky internal diaphragm (commonly found in 11-inch factory boosters), this Aeroflow unit utilises two smaller diaphragms stacked front-to-back.

This dual-diaphragm design delivers the stopping power of a much larger unit while significantly reducing the booster’s footprint—giving you the crucial clearance needed for tall rocker covers or large-displacement engines.

Finished in black, it provides a sleek stealthy look while delivering reliable, street-ready performance.

Key Specifications:

• Product Type: Vacuum Brake Booster

• Application: General Motors (GM) Specific

• Design: Dual Diaphragm (Superior assist in a compact size)

• Outer Diameter: 8 inches

• Finish: Black

• Manufacturer Part Number: AF300-106BLK

• Brand: Aeroflow Performance

About Aeroflow Performance

Established in 2010, Aeroflow Performance Products has grown to design and manufacture nearly 11,000 exceptional quality automotive components. From precision fittings and silicone hoses to fabricated tanks and workshop tools, Aeroflow consistently leads the way for motorsport and performance enthusiasts.

Looking for a different finish? This GM-specific brake booster is also available in 7″ and 8″ variants, in black or chrome.