Fire every cylinder in the 3.8L V6 that powered Ford and Mercury rear-drivers with the Autolite Copper Spark Plug 2546. It's cataloged as a direct-fit replacement for the 1984-1986 Ford LTD, 1984-1986 Ford Mustang, 1984-1987 Ford Thunderbird, 1984-1986 Mercury Capri, 1984-1987 Mercury Cougar and 1984-1986 Mercury Marquis, all with the V6-3.8L engine, which uses six plugs per application.
This is a resistor-type plug rated at 5,000 ohms to help suppress radio-frequency interference. It carries a standard, long-projection center electrode, a single standard ground electrode, an M14-1.25 metric thread (14 mm diameter), a 5/8-inch hex and a tapered seat. It arrives pre-gapped to 0.054 in (1.4 mm) with a heat range of 7; washers are not included. Country of origin: China. Backed by a 2-year limited warranty. Manufacturer part number 2546.
This part cross-references / interchanges with the following part numbers:
Which vehicles does the Autolite 2546 fit?
It's a direct-fit replacement for the 1984-1986 Ford LTD, Mustang, Mercury Capri and Marquis, plus the 1984-1987 Ford Thunderbird and Mercury Cougar, all with the V6-3.8L engine. See the Buyer's Guide tab to confirm your vehicle.
Is this a resistor spark plug?
Yes. It is a resistor-type plug with 5,000 ohms of resistance, which helps suppress radio-frequency interference.
Does it come pre-gapped, and is a washer included?
It ships pre-gapped to 0.054 in (1.4 mm) and uses a tapered seat, so no washer is included. Verify the gap against your engine's specification before installing.
How many plugs do I need for my engine?
The listed V6-3.8L applications use six plugs each. This plug is sold individually, so order the quantity your engine requires.
What are the thread and hex sizes?
It has an M14-1.25 metric thread with a 14 mm diameter, a 5/8-inch hex, a tapered seat and a heat range of 7.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
