Product Description
The Midland Hypower-913 C4055 is a frame-mounted vacuum brake booster designed for hydraulic brake systems used on older medium- and heavy-duty Chevrolet and GMC trucks.
The C4055 uses engine vacuum to increase hydraulic braking force, reducing the amount of pedal effort required to operate the vehicle’s brakes. It features a single-diaphragm design with an approximately 11-11/16-inch diameter housing and an overall length of approximately 16-3/4 inches.
This booster uses a 1/4-inch inverted-flare hydraulic inlet and a 5/16-inch inverted-flare hydraulic outlet. The C4055 configuration is associated with Midland Hypower vacuum-assisted braking systems and is commonly found on older commercial truck brake systems.
Part Number: C4055
Brand: Midland
Product Line: Hypower-913
Product Type: Vacuum Brake Booster
Booster Type: Single Diaphragm
Mounting Style: Frame Mount
Diameter: Approximately 11-11/16 in.
Overall Length: Approximately 16-3/4 in.
Hydraulic Inlet: 1/4 in. inverted flare
Hydraulic Outlet: 5/16 in. inverted flare
Common Vehicle Makes: Chevrolet / GMC
Haldex Reman Cross Reference: RV405501X
Haldex Core Group: VAC1032
Always verify the original booster number, mounting configuration, overall dimensions, hydraulic port sizes, and vehicle brake system before ordering.
