Autolite Genuine Small Engine Copper Core Spark Plug # 437 Fits select: 1966 AMERICAN MOTORS AMBASSADOR, 1966 AMERICAN MOTORS MARLIN

Includes (1) 437 Spark Plug. Thread Size: 14mm, Thread Pitch: 1.25mm, Seat Type: Gasket, Reach: 11mm (7/16"). Hex Size: 13/16" (21mm), Terminal Type: Solid. Material: Nickel, Type: Standard, Projection: Projected. Copper core improves resistance to fouling. . Compatible with the Following: Bosch: WR9FC, Champion: 857, 91, H14Y, H18Y, RH18Y, XH14Y, XH18Y, NGK: 3112, B4L, B-4L, Torch: 4114J, H4C

Copper-glass seal bonds insulator, terminal post, and center electrode together to provide a tight seal that is 100 percent leak-proof Cold-formed steel shell and precision rolled threads, with one-piece terminal post to add strength Multi-rib insulator reduces danger of "flash-over" Resistor reduces radio frequency interference (RFI) and electrode erosion Full copper core electrode provides better performance in all conditions Fits Select: 1966 AMERICAN MOTORS AMBASSADOR 8 Cyl 5.4 L 1966 AMERICAN MOTORS MARLIN 8 Cyl 5.4 L 1967-1968 JEEP JEEP 8 Cyl 5.4 L 1967 JEEP JEEP TRUCK 8 Cyl 5.4 L 1966 AMERICAN MOTORS RAMBLER 8 Cyl 5.4 L 1966 AMERICAN MOTORS REBEL 8 Cyl 5.4 L and more - add your vehicle to our fit widget to check