ACDelco Professional Brake Drums are constructed with G3000 SAE qualified material for structural integrity and maximum service life. They are tested to ISO/TS 16949 quality system standards and validated for balance to provide better braking performance. Chamfer angle, vane configuration, and plate thickness all follow the OE design, making them a premium aftermarket replacement for your GM and non-GM vehicle. Also, no machining is required. ACDelco Professional Brake Drums are ready to be installed right out of the box.

• Inspected for balance; resulting in smooth brake operation and noise reduction
• Independently tested with Noise/Vibration/Harshness (NVH) and durability/wear testing; resulting in high quality and reliable products
• Follows original manufacturers' designs for dispersing heat, helping to prolong pad and rotor life while reducing noise and vibration

ABS Tone Ring Included:	No
Bolt Circle Diameter (in):	5.5
Bolt Circle Diameter (mm):	139.7
Bolt Hole Quantity:	6
Brake Surface Finish:	Turned
Center Bore Diameter (in):	3.09in
Center Bore Diameter (mm):	78.6mm
Depth:	3.21
Depth:	81.55
Discard Thickness (in):	11.24
Discard Thickness (mm):	285.5
Grade Type:	Regular
Height (in):	4
Length (in):	11.24
Material:	Cast Iron
Maximum Brake Diameter (Discard):	285.5
Measurements:	11 5/32 in X 2 3/4 in
Mount Hole Diameter (in):	0.629in
Mount Hole Diameter (mm):	15.977mm
Nominal Drum Diameter:	0.443
Nominal Drum Diameter:	11.25
Outer Cooling Fins:	Yes
Outside Diameter:	0.526
Outside Diameter:	13.35
Programming Required:	No
Stud/Lug Hole Diameter:	0.621
Stud/Lug Hole Diameter:	15.75
Stud/Lug Hole Quantity:	6
Weight:	39.6
Width (in):	14.6

• 1988-1998 Chevrolet C2500 | Position: Rear
• 1988-1999 Chevrolet K1500 | Position: Rear
• 1988-1998 Chevrolet K2500 | Position: Rear
• 1988-1998 GMC C2500 | Position: Rear
• 1988-1999 GMC K1500 | Position: Rear
• 1988-1998 GMC K2500 | Position: Rear
• 1996-2002 Chevrolet Express 2500 | Position: Rear
• 1996-2002 GMC Savana 2500 | Position: Rear