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ACDelco 18B4 Brake Drum
for 1978 (please select make/model)

ACDelco 18B4 Brake Drum - 1978 Image 1
ACDelco 18B4 Brake Drum - 1978 Image 2
ACDelco 18B4 Brake Drum - 1978 Image 3
ACDelco 18B4 Brake Drum - 1978 Image 4
ACDelco 18B4 Brake Drum - 1978

ACDelco
Brand:ACDelco
Part Number: 18B4
UPC: 00036666682564
Weight: 22.5 lbs
Condition:New



On Sale:

$67.10

Availability:
4 in Stock
Warehouse: US-12
Quantity:

Product Information

Description:

Get the ACDelco 18B4 Brake Drum for your 1978. Buy now and secure your purchase online!

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. ⚠ WARNING: Cancer and Reproductive Harm - https://www.P65Warnings.ca.gov

Features and Benefits:

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

Specifications:

ABS Tone Ring Included:
No
Bolt Circle Diameter (in):
5 in
Bolt Circle Diameter (mm):
127 mm
Bolt Hole Quantity:
5
Brake Surface Finish:
Turned
Center Bore Diameter (in):
3.06in
Center Bore Diameter (mm):
77.8mm
Depth:
3.47 in.
Depth:
88.15 mm
Discard Thickness (in):
11.06 in
Discard Thickness (mm):
280.9 mm
Grade Type:
Regular
Height (in):
4.7 in
Length (in):
11.06 in
Material:
Cast Iron
Maximum Brake Diameter (Discard):
280.92 mm
Mount Hole Diameter (in):
0.536in
Mount Hole Diameter (mm):
13.614mm
Nominal Drum Diameter:
0.435 in.
Nominal Drum Diameter:
11.05 mm
Outer Cooling Fins:
Yes
Outside Diameter:
0.551 in.
Outside Diameter:
14 mm
Programming Required:
No
Stud/Lug Hole Diameter:
0.528 in.
Stud/Lug Hole Diameter:
13.4 mm
Stud/Lug Hole Quantity:
5
Weight:
22.5 lb
Width (in):
14.4 in

Features and Benefits:

  • – Calipers and wheel cylinders should be checked every brake inspection and serviced or replaced as required.
  • – Check brake fluid level at every oil change. Replace fluid according to owner's manual recommendations.
  • – Check the thickness of your brake pads.
  • – Inspect the brake lines for rust, punctures, or visible leaks (You may be able to do this, but consult a qualified technician if necessary).
  • – Inspection of brake lining and pads for wear or contamination by brake fluid or grease.
  • – Inspection of the brake hoses for brittleness or cracking.
  • – Inspection of wheel bearings and grease seals.
  • – Parking brake adjustments (as needed).
  • The following inspections and maintenance procedures can help prevent potential brake problems:
  • The following should be conducted by a qualified technician:

Specifications:

Country of Origin:
US

Select a vehicle to narrow ACDelco 18B4 Brake Drum fitment info!

Last Updated: 03/03/2024

Years Vehicle Per Vehicle Position Fit NotesFitment Notes

1980

 

1979

 

1978

 

1977

 

1976

 

1980

 

1979

 

1978

 

1977

 

1976

 
Buick Electra

5.7L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Buick Electra



5.7L V8 Gas OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1979

 

1978

 

1977

 

1979

 

1978

 

1977

 
Buick Electra

6.6L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Buick Electra



6.6L V8 Gas OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1980

 

1979

 

1978

 

1977

 

1980

 

1979

 

1978

 

1977

 
Buick Estate Wagon

5.7L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Buick Estate Wagon



5.7L V8 Gas OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1979

 

1978

 

1977

 

1979

 

1978

 

1977

 
Buick Estate Wagon

6.6L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Buick Estate Wagon



6.6L V8 Gas OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1985

 

1984

 

1983

 

1982

 

1981

 

1980

 

1979

 

1978

 

1977

 

1976

 

1985

 

1984

 

1983

 

1982

 

1981

 

1980

 

1979

 

1978

 

1977

 

1976

 
Buick LeSabre

3.8L V6 Gas OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Buick LeSabre



3.8L V6 Gas OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1980

 

1979

 

1978

 

1980

 

1979

 

1978

 
Buick LeSabre

3.8L V6 Gas OHV Turbo
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Buick LeSabre



3.8L V6 Gas OHV Turbo

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1980

 

1979

 

1978

 

1977

 

1980

 

1979

 

1978

 

1977

 
Buick LeSabre

4.9L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Buick LeSabre



4.9L V8 Gas OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1980

 

1979

 

1978

 

1977

 

1976

 

1975

 

1974

 

1973

 

1972

 

1971

 

1980

 

1979

 

1978

 

1977

 

1976

 

1975

 

1974

 

1973

 

1972

 

1971

 
Buick LeSabre

5.7L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Buick LeSabre



5.7L V8 Gas OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1978

 

1978

 
Buick LeSabre

5.0L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Buick LeSabre



5.0L V8 Gas OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1978

 

1977

 

1978

 

1977

 
Buick LeSabre

6.6L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Buick LeSabre



6.6L V8 Gas OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1980

 

1979

 

1978

 

1977

 

1980

 

1979

 

1978

 

1977

 
Checker Marathon

5.0L V8 Gas OHV
2
 
Rear
 
Professional
 

Checker Marathon



5.0L V8 Gas OHV

Rear Professional

2 Per Vehicle

1979

 

1978

 

1977

 

1976

 

1975

 

1974

 

1973

 

1979

 

1978

 

1977

 

1976

 

1975

 

1974

 

1973

 
Checker Marathon

4.1L L6 Gas OHV,
5.7L V8 Gas OHV
2
 
Rear
 
Professional
 

Checker Marathon



4.1L L6 Gas OHV,
5.7L V8 Gas OHV

Rear Professional

2 Per Vehicle

1986

 

1985

 

1984

 

1983

 

1982

 

1981

 

1980

 

1979

 

1978

 

1977

 

1986

 

1985

 

1984

 

1983

 

1982

 

1981

 

1980

 

1979

 

1978

 

1977

 
Chevrolet Caprice

5.0L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Chevrolet Caprice



5.0L V8 Gas OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1980

 

1979

 

1978

 

1977

 

1976

 

1975

 

1974

 

1973

 

1972

 

1971

 

1980

 

1979

 

1978

 

1977

 

1976

 

1975

 

1974

 

1973

 

1972

 

1971

 
Chevrolet Caprice

5.7L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Chevrolet Caprice



5.7L V8 Gas OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1979

 

1978

 

1977

 

1979

 

1978

 

1977

 
Chevrolet Caprice

4.1L L6 Gas OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Chevrolet Caprice



4.1L L6 Gas OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1985

 

1984

 

1983

 

1982

 

1981

 

1980

 

1979

 

1978

 

1977

 

1985

 

1984

 

1983

 

1982

 

1981

 

1980

 

1979

 

1978

 

1977

 
Chevrolet Impala

5.0L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Chevrolet Impala



5.0L V8 Gas OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle
Chevrolet Impala

5.7L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Chevrolet Impala



5.7L V8 Gas OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1979

 

1978

 

1977

 

1979

 

1978

 

1977

 
Chevrolet Impala

4.1L L6 Gas OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Chevrolet Impala



4.1L L6 Gas OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1981

 

1980

 

1979

 

1978

 

1981

 

1980

 

1979

 

1978

 
Oldsmobile 98

5.7L V8 Diesel OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Oldsmobile 98



5.7L V8 Diesel OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1980

 

1979

 

1978

 

1977

 

1980

 

1979

 

1978

 

1977

 
Oldsmobile 98

5.7L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Oldsmobile 98



5.7L V8 Gas OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1979

 

1978

 

1977

 

1979

 

1978

 

1977

 
Oldsmobile 98

6.6L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Oldsmobile 98



6.6L V8 Gas OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1985

 

1984

 

1983

 

1982

 

1981

 

1980

 

1979

 

1978

 

1985

 

1984

 

1983

 

1982

 

1981

 

1980

 

1979

 

1978

 
Oldsmobile Custom Cruiser

5.7L V8 Diesel OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Oldsmobile Custom Cruiser



5.7L V8 Diesel OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1980

 

1979

 

1978

 

1977

 

1980

 

1979

 

1978

 

1977

 
Oldsmobile Custom Cruiser

5.7L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Oldsmobile Custom Cruiser



5.7L V8 Gas OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1979

 

1978

 

1977

 

1979

 

1978

 

1977

 
Oldsmobile Custom Cruiser

6.6L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Oldsmobile Custom Cruiser



6.6L V8 Gas OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1985

 

1984

 

1983

 

1982

 

1981

 

1980

 

1979

 

1978

 

1985

 

1984

 

1983

 

1982

 

1981

 

1980

 

1979

 

1978

 
Oldsmobile Delta 88

5.7L V8 Diesel OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Oldsmobile Delta 88



5.7L V8 Diesel OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1985

 

1984

 

1983

 

1982

 

1981

 

1980

 

1979

 

1978

 

1977

 

1985

 

1984

 

1983

 

1982

 

1981

 

1980

 

1979

 

1978

 

1977

 
Oldsmobile Delta 88

3.8L V6 Gas OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Oldsmobile Delta 88



3.8L V6 Gas OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1982

 

1981

 

1980

 

1979

 

1978

 

1977

 

1982

 

1981

 

1980

 

1979

 

1978

 

1977

 
Oldsmobile Delta 88

4.3L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Oldsmobile Delta 88



4.3L V8 Gas OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1980

 

1979

 

1978

 

1977

 

1976

 

1975

 

1974

 

1973

 

1972

 

1971

 

1980

 

1979

 

1978

 

1977

 

1976

 

1975

 

1974

 

1973

 

1972

 

1971

 
Oldsmobile Delta 88

5.7L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Oldsmobile Delta 88



5.7L V8 Gas OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1979

 

1978

 

1977

 

1979

 

1978

 

1977

 
Oldsmobile Delta 88

6.6L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN Brakes
with 4in Wide Drums
 

Oldsmobile Delta 88



6.6L V8 Gas OHV

Rear Professional
with 11 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1980

 

1979

 

1978

 

1977

 

1980

 

1979

 

1978

 

1977

 
Pontiac Bonneville

4.9L V8 Gas OHV,
5.7L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN x 2 IN Brakes
with 4in Wide Drums
 

Pontiac Bonneville



4.9L V8 Gas OHV,
5.7L V8 Gas OHV

Rear Professional
with 11 IN x 2 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1979

 

1978

 

1977

 

1976

 

1975

 

1974

 

1973

 

1972

 

1971

 

1979

 

1978

 

1977

 

1976

 

1975

 

1974

 

1973

 

1972

 

1971

 
Pontiac Bonneville

6.6L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN x 2 IN Brakes
with 4in Wide Drums
 

Pontiac Bonneville



6.6L V8 Gas OHV

Rear Professional
with 11 IN x 2 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1981

 

1980

 

1979

 

1978

 

1977

 

1981

 

1980

 

1979

 

1978

 

1977

 
Pontiac Catalina

3.8L V6 Gas OHV
2
 
Rear
 
Professional
with 11 IN x 2 IN Brakes
with 4in Wide Drums
 

Pontiac Catalina



3.8L V6 Gas OHV

Rear Professional
with 11 IN x 2 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1980

 

1979

 

1978

 

1977

 

1980

 

1979

 

1978

 

1977

 
Pontiac Catalina

4.9L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN x 2 IN Brakes
with 4in Wide Drums
 

Pontiac Catalina



4.9L V8 Gas OHV

Rear Professional
with 11 IN x 2 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1980

 

1979

 

1978

 

1977

 

1976

 

1980

 

1979

 

1978

 

1977

 

1976

 
Pontiac Catalina

5.7L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN x 2 IN Brakes
with 4in Wide Drums
 

Pontiac Catalina



5.7L V8 Gas OHV

Rear Professional
with 11 IN x 2 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1979

 

1978

 

1977

 

1976

 

1975

 

1974

 

1973

 

1972

 

1971

 

1979

 

1978

 

1977

 

1976

 

1975

 

1974

 

1973

 

1972

 

1971

 
Pontiac Catalina

6.6L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN x 2 IN Brakes
with 4in Wide Drums
 

Pontiac Catalina



6.6L V8 Gas OHV

Rear Professional
with 11 IN x 2 IN Brakes
with 4in Wide Drums

2 Per Vehicle

1978

 

1977

 

1976

 

1978

 

1977

 

1976

 
Pontiac Grand Safari

6.6L V8 Gas OHV
2
 
Rear
 
Professional
with 11 IN x 2 IN Brakes
with 4in Wide Drums
 

Pontiac Grand Safari



6.6L V8 Gas OHV

Rear Professional
with 11 IN x 2 IN Brakes
with 4in Wide Drums

2 Per Vehicle

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