DuraGo BD80109 Brake Drum - Rear

DuraGo BD80109 Rear Brake Drum

The DuraGo BD80109 brake drum is a cast iron replacement for rear drum brake applications that require a 4-bolt, full cast design. It is built for select Chevrolet Cobalt, Pontiac G5, Saturn Ion, Pontiac G4, and Pontiac Pursuit models, including rear 4 stud wheel applications.

Key Features

• Cast iron construction for dependable braking performance
• Full cast drum design
• Nominal drum diameter: 230 mm / 9.06 in
• Maximum brake diameter (discard): 231 mm / 9.09 in
• Outside diameter: 271 mm / 10.67 in
• Brake surface width: 54.5 mm / 2.15 in
• Center hole diameter: 57 mm / 2.24 in
• Bolt circle diameter: 100 mm / 3.94 in
• Bolt hole quantity: 4
• Overall height: 73.5 mm / 2.89 in

Detailed Description

DuraGo BD80109 is manufactured by ISO certified factories with attention to fit, form, and function. As part of DuraGo’s brake drum and rotor program, this rear brake drum is cataloged for professional repair use and matches the dimensional requirements needed for select compact GM rear drum brake systems. This part cross-references Anchor 9749 for the same application.

For shoppers searching for a rear brake drum for 2007-2008 Chevrolet Cobalt, 2007-2008 Pontiac G5, or 2003-2007 Saturn Ion, BD80109 provides the specified cast iron dimensions and 4-bolt mounting pattern. It also applies to 2005-2006 Chevrolet Cobalt, 2005-2006 Pontiac G4, and 2005-2006 Pontiac Pursuit rear brake service.

What This Brake Drum Helps Address

• Rear brake pulsation caused by drum wear or out-of-round condition
• Reduced braking consistency from a worn braking surface
• Noise from damaged or heat-affected drum surfaces
• Service replacement needs on rear drum brake systems
• Fitment-specific replacement for select Chevrolet Cobalt, Pontiac G5, and Saturn Ion rear applications

Installation Notes and Tips

Verify drum diameter, bolt circle, center hole, and brake surface width against the original part before installation. Confirm rear application and wheel configuration, especially on 2007-2008 Chevrolet Cobalt and 2007-2008 Pontiac G5 models with 4 stud wheels. Inspect shoes, hardware, and wheel cylinders during brake service so the new drum can seat properly and deliver even contact.

Quality Assurance

DuraGo manufactures this brake drum through ISO certified factories and builds the program around catalog accuracy and OE-style fitment requirements. The BD80109 is engineered to meet fit, form, and function expectations for the listed rear applications.