Tap to view 2 more
ACDelco 18B251 - Brake Drum - Rear, Turned, Cast Iron, Regular, Finned Cooling Fins
$6449
In stock
limited availability at this price!
Pay over 3-12 months with 
. Learn more
. Learn more
ACDELCO part description
Technical Specifications
| Part Number | 18B251 |
| weight | 15 lb 7 oz |
Product Description
Rear Brake Drum
Product Attributes
| Material | Cast Iron |
| Bolt Hole Quantity | 6 |
| Outside Diameter | 280.2mm (11.03 in.) |
| Bolt Hole Diameter | 16.815mm (0.66 in.) |
| Mount Type | Regular Grade |
| Outer Cooling Fins | Yes |
| Center Hole Diameter | 72mm (2.83 in.) |
| Bolt Circle Diameter | 114.3mm (4.5 in.) |
| ABS Sensor Ring Included | No |
| Drum Type | Turned |
| Maximum Diameter | 230mm (9.06 in.) |
| Maximum Diameter | 230mm (9.06 in.) |
| Nominal Diameter | 228.6mm (9 in.) |
| Nominal Diameter | 228.6mm (9 in.) |
| Programming Required | No |
| Programming Required | No |
| Quantity | 1 per Pack |
| Quantity | 1 per Pack |
| Type | Finned Cooling Fins |
| Type | Finned Cooling Fins |
| Mount Hole Diameter (in) | 0.662in |
| Center Bore Diameter (in) | 2.83in |
| Bolt Circle Diameter | 4.5 IN |
| Height (in) | 5.75 in |
| Nominal Drum Diameter | 0.356 IN |
| Measurements | 9 in |
| Length (In) | 9.06 IN |
| Discard Thickness (in) | 9.06 in |
| Nominal Drum Diameter | 9.05 MM |
| Width (in) | 11.62 in |
| Weight | 15.6 lb |
| Mount Hole Diameter (mm) | 16.815mm |
| Center Bore Diameter (mm) | 72mm |
| Bolt Circle Diameter | 114.3 MM |
| Depth | 92.45 MM |
| Discard Thickness (mm) | 230 mm |
| Maximum Brake Diameter (Discard) | 230.12 MM |
| Outside Diameter | 11.05 MM |
| Depth | 3.64 IN |
| Product Description | 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. ⚠<b> WARNING:</b> Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
| Signs of Wear & Troubleshooting - Section 1 - Bullet 5 | Brake pedal pulsation (not to be confused with normal ABS operation). |
| Good Maintenance Practices - Section 1 - Bullet 2 | Calipers and wheel cylinders should be checked every brake inspection and serviced or replaced as required. |
| Good Maintenance Practices - Section 1 - Bullet 1 | Check brake fluid level at every oil change. Replace fluid according to owner's manual recommendations. |
| Good Maintenance Practices - Section 1 - Bullet 4 | Check the thickness of your brake pads. |
| FAQ - Question 1 | Do I have to replace all my brake parts when replacing my brake drums? |
| FAQ - Question 3 | Do I have to replace my brake drums after a certain amount of time? |
| FAQ - Question 2 | Does ACDelco offer other grades of brake drums? |
| Features & Benefits - Bullet 3 | Follows original manufacturers' designs for dispersing heat, helping to prolong pad and rotor life while reducing noise and vibration |
| Features & Benefits - Bullet 2 | Independently tested with Noise/Vibration/Harshness (NVH) and durability/wear testing; resulting in high quality and reliable products |
| Good Maintenance Practices - Section 1 - Bullet 3 | Inspect the brake lines for rust, punctures, or visible leaks (You may be able to do this, but consult a qualified technician if necessary). |
| Features & Benefits - Bullet 1 | Inspected for balance; resulting in smooth brake operation and noise reduction |
| Good Maintenance Practices - Section 2 - Bullet 2 | Inspection of brake lining and pads for wear or contamination by brake fluid or grease. |
| Good Maintenance Practices - Section 2 - Bullet 1 | Inspection of the brake hoses for brittleness or cracking. |
| Good Maintenance Practices - Section 2 - Bullet 3 | Inspection of wheel bearings and grease seals. |
| FAQ - Answer 3 | No, but it is a good idea to inspect them at every tire rotation. |
| FAQ - Answer 1 | No, but it is a good idea to inspect them for wear-out, cracking, leaking etc. |
| Good Maintenance Practices - Section 2 - Bullet 4 | Parking brake adjustments (as needed). |
| Grade Type | Regular |
| Signs of Wear & Troubleshooting - Section 1 - Bullet 4 | Squealing or scraping noises. |
| Good Maintenance Practices - Section 1 - Header | The following inspections and maintenance procedures can help prevent potential brake problems: |
| Good Maintenance Practices - Section 2 - Header | The following should be conducted by a qualified technician: |
| Brake Surface Finish | Turned |
| FAQ - Answer 2 | Yes, ACDelco also offers GM OE and Advantage brake drums. |
| Outside Diameter | 0.434 IN |
| Stud/Lug Hole Diameter | 0.654 IN |
| Stud/Lug Hole Diameter | 16.6 MM |
| Stud/Lug Hole Quantity | 6 |
| ABS Tone Ring Included | No |
Additional Information
| Warranty Special | 24 Months/Unlimited Miles Limited Warranty (Parts Only). Please see ACDelco.com for more details|24 Months/40,000 Kilometers Limited Warranty (Parts Only). Please see ACDelcocanada.com for more details |
| Harmonized Tariff Code (HTS) | 8708305020 |
| Country of Origin (Primary) | CN |
| Country of Origin 2 | US |
| Warranty Special UOM | TX |
| UPC | 00707773350812 |
A true OEM auto parts brand for GM and non-GM vehicles, ACDelco® offers a wide portfolio of parts designed to keep vehicles on the road longer. These parts work precisely and fit perfectly because they are designed, engineered, tested, and backed by General Motors. But ACDelco also carries aftermarket components that go through the same 18-step quality approval process as the OE parts. Whether customers choose OE or aftermarket, they’d get the same reliable performance, precise engineering, and superior reliability for years to come. ACDelco’s expansive product portfolio includes alternators, filters, batteries, brakes, belts and hoses, oil and fluids, and suspension parts. These products are made to meet GM and non-GM vehicles’ ever-evolving powertrain, collision, maintenance, and repair needs.
California residents see Prop 65 Warning(s)
Don't know your part number?
Take a photo and we'll identify it!
