If you have the 4 headlight set up.... round.... the low beams are 4001, and the high beams are 4002, I can't remember the numbers for the rectangle factory 4 head light set up.....
Usually on the back of the bulb will be an industry standard #, like 4001, 4002, 4537.
Do a google search putting bulb (bulb # 4537) in front of the number.... or I use Phillips, or Silvania (sp),
If your an Amazon prime member you'll usually find the exact bulb, for 25-34% less than Auto-zone... etc.....
Or take that same number and go to one of the parts stores and have them look it up and order it... if the bulb doesn't have a number on the back... go to a NAPA store and find one of their old HEADLAMP/BULB application books.. and they will show all of them by physical dimension... or Phillips or one of the other manufactures will have a catalog available on the net..
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Retired Business Owner, Re-manufacturing HD Clutches, Brake Shoes, Air Compressors, Sales & Installation of PacBrake and other Industrial Friction
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