Champion Copper Plus Spark Plug J12YC – Part Number 10

Description:
The Champion Copper Plus J12YC Spark Plug is designed to deliver dependable ignition performance, reliable heat control, and long service life across a wide range of automotive, marine, industrial, agricultural, powersport, and small engine applications. Built as an OE-type replacement, this plug features a copper core center electrode that improves conductivity and helps manage heat more accurately for consistent operation and reduced wear.

Engineered to resist fouling and corrosion, the J12YC is manufactured to ISO and SAE standards for proven performance and durability. Its nickel center electrode, nickel copper alloy ground electrode, and flat-seat gasket design make it a reliable replacement spark plug for older and specialty engine applications where accurate heat range and dependable ignition performance are critical.

Features:

• Copper core center electrode provides strong conductivity and accurate heat control

• OE-type replacement spark plug for dependable fit and function

• Resists fouling for reliable ignition performance

• Superior corrosion resistance for longer service life

• Built to ISO and SAE standards for proven performance

• Nickel center electrode tip for dependable durability

• Flat seat with crush washer for secure installation

• Removable nut terminal for flexible connection options

Product Specifications:

• Part number: 10

• Plug type: J12YC

• Classification: Champion Copper Plus

• Grade type: Standard Replacement

• Part description: Spark Plug

• Center electrode tip material: Nickel

• Center electrode design: Standard

• Center electrode diameter: 0.1 in

• Ground electrode material: Nickel copper alloy

• Ground electrode core material: Nickel

• Ground electrode tip material: Nickel

• Ground electrode tip design: Standard

• Ground electrode quantity: 1

• Copper core center electrode: Yes

• Pre-gap size: 0.035 in / 0.89 mm

• Hex size: 0.813 in / 20.650 mm

• Seat type: Flat

• Reach: 0.375 in

• Thread diameter: 0.551 in / 14.000 mm

• Resistor type: No

• Washer included: Yes

• Washer type: Crush

• Electrical terminal type: Removable Nut

• Indexed: No

• Insulator height: 0.09 in

• Insulator projection: 0.09 in

• Installed height: 2.24 in

• Taper diameter: 0.31 in

• Manufacturer heat range: 12

• Subject to Prop 65: No

Fitment:

Applications provided include a wide range of vehicles and equipment across these categories:

• Passenger Car & Light Truck

• Commercial, Industrial & Agricultural

• Powersport

• Small Engine

• Marine Applications

• Performance

Selected fitment examples from the provided list include:

• Apollo GT (1962–1965)

• Avanti II (1965–1970)

• Buick Electra, Estate Wagon, Gran Sport, Invicta, LeSabre, Riviera, Skylark, Special, Sportwagon, Wildcat

• Checker Aerobus, Marathon

• Chevrolet Bel Air, Biscayne, Brookwood, C10 Pickup, C10 Suburban, C20 Pickup, C20 Suburban, C30 Pickup, C60, Camaro, Caprice, Chevelle, Chevy II, Corvette, Del Ray, El Camino, G10 Van, G20 Van, Impala, K10 Pickup, K10 Suburban, K20 Pickup, K20 Suburban, K30 Pickup, Kingswood, Nomad, P20 Van, P30 Van, Parkwood, Two-Ten Series, Yeoman

• Chrysler 300, Cordoba, Imperial, New Yorker, Newport, Town & Country

• DeSoto Adventurer

• Dodge 330, 440, 880, B100/B200/B300, Challenger, Charger, Coronet, D100/D200/D300, Dart, Monaco, Polara, Ramcharger, Royal Monaco, W100/W200/W300

• Fargo A100/A108, D100/D110/D200/D210, F100/FW100, W100/W110/W200

• GMC 1000, 1000 Series, 1500 Series, 2500 Series, 3000, 3500, C/K pickups and Suburbans, G vans, P vans, Suburban, Truck, V3000 Forward Control

• International 1110, 1210, 1500B/C/D, M1100, M1400, M800, Scout II

• Jeep CJ3, CJ5, CJ5A, CJ6, CJ6A, Commando, DJ5, DJ6, Dispatcher, FC150, Jeepster, Universal, Universal Truck

• Jensen C-V8, Interceptor

• Oldsmobile 442, 98, Cutlass, Delmont 88, Delta 88, Dynamic 88, F85, Fiesta, Jetstar 88, Jetstar I, Starfire, Super 88, Toronado, Vista Cruiser

• Plymouth Barracuda, Belvedere, Belvedere II, Cuda, Fury, Fury I, Fury II, Fury III, GTX, Gran Fury, Road Runner, Satellite, Savoy, Sport Wagon, Suburban, Superbird, Trailduster, VIP, Valiant

• Pontiac Acadian, Beaumont, Bonneville, Catalina, Grand Prix, Laurentian, LeMans, Parisienne, Star Chief, Strato-Chief, Tempest, Ventura

• Studebaker Avanti, Challenger, Commander, Cruiser, Daytona, Hawk, Lark, Wagonaire

• Toyota Land Cruiser (1960–1972)

Because the original input already included an extensive fitment list, that fitment information should be retained on the product page for application accuracy.