Denso 4715 Spark Plug

Denso Iridium TT Spark Plug 4715

Denso Iridium TT 4715 is a spark plug built for OE-style durability with a performance-focused electrode design. It combines an iridium center electrode with a platinum twin-tip ground electrode to support consistent ignition, stable combustion, and dependable throttle response in a wide range of classic Ford, Chevrolet, GMC, and other V8 applications.

Compatible With many 1977-1997 Ford F-350, Ford Bronco, Ford F-150, Chevrolet Camaro, and similar applications listed below, this plug is a direct-fit secondary ignition service part for vehicles that call for the specified thread, reach, seat, and heat range.

Key Features

• Iridium center electrode tip for precise spark delivery
• Platinum twin-tip ground electrode design for extended service life
• Copper center core and nickel ground core for efficient heat transfer
• 5000 ohm resistance for controlled ignition performance
• Pre-gapped at 1.0 mm for installation convenience
• Tapered seat, 14.00 mm thread diameter, 11.60 mm reach, and 16 mm hex size
• Manufacturer heat range 16

Product Details

The Iridium TT line is Denso’s performance-oriented spark plug family that pairs long-life electrode materials with an OE-style fit and firing profile. Part number 4715 uses an iridium center tip and a platinum twin-tip ground configuration to promote consistent spark exposure and wear resistance over time. That makes it a practical choice for drivers servicing older Ford, Chevrolet, GMC, Jeep, Chrysler, Pontiac, Buick, Oldsmobile, Lincoln, Mercury, Cadillac, Dodge, and Plymouth applications where correct plug geometry matters.

This part cross-references DENSO Auto Parts ITF16TT for the same application.

Common Issues This Part Addresses

• Hard starting caused by worn spark plug electrodes
• Rough idle from inconsistent ignition firing
• Misfire conditions related to plug wear or incorrect gap
• Reduced throttle response from weak spark delivery
• Maintenance intervals shortened by conventional plug wear

Installation Notes and Tips

• Verify the vehicle’s required thread diameter, reach, seat type, and heat range before installation.
• Check the gap against the engine specification even though the plug is pre-gapped at 1.0 mm.
• Inspect ignition wires, coils, and distributor components during spark plug service.
• Use proper torque for tapered-seat spark plugs to avoid thread or sealing damage.
• Confirm application details for vehicles with cast iron head notes, such as the 1990-1991 Chevrolet Corvette listing.

Quality Assurance

Denso manufactures the Iridium TT line with OE-style construction and performance-focused electrode materials. Part number 4715 is built to the listed specifications for fitment and ignition service consistency across the supported applications.

Vehicle Fitment

• Fits 1978-1997 Ford F-350, N/A
• Fits 1978-1984 Ford Bronco, N/A
• Fits 1990-1996 Ford Bronco, N/A
• Fits 1978-1984 Ford E-150 Econoline, N/A
• Fits 1990-1996 Ford E-150 Econoline, N/A
• Fits 1978-1984 Ford E-150 Econoline Club Wagon, N/A
• Fits 1990-1996 Ford E-150 Econoline Club Wagon, N/A
• Fits 1978-1996 Ford E-350 Econoline, N/A
• Fits 1978-1996 Ford E-350 Econoline Club Wagon, N/A
• Fits 1978-1984 Ford F-150, N/A
• Fits 1990-1996 Ford F-150, N/A
• Fits 1978-1996 Ford F-250, N/A
• Fits 1979-1985 Ford Mustang, N/A
• Fits 1987-1995 Ford Mustang, N/A
• Fits 1978-1985 Ford Thunderbird, N/A
• Fits 1991-1993 Ford Thunderbird, N/A
• Fits 1978-1985 Mercury Cougar, N/A
• Fits 1991-1993 Mercury Cougar, N/A
• Fits 1978-1992 Pontiac Firebird, N/A
• Fits 1994-1995 Pontiac Firebird, N/A
• Fits 1978-1992 Chevrolet Camaro, N/A
• Fits 1978-1990 Chevrolet Caprice, N/A
• Fits 1992-1993 Chevrolet Caprice, N/A
• Fits 1988-1993 Chevrolet C1500, N/A
• Fits 1988-1993 Chevrolet C2500, N/A
• Fits 1988-1993 Chevrolet K1500, N/A
• Fits 1978-1982 Chevrolet Corvette, N/A
• Fits 1984 Chevrolet Corvette, N/A
• Fits 1990-1991 Chevrolet Corvette, N/A
• Fits 1978-1988 Chevrolet Monte Carlo, N/A
• Fits 1978-1986 Chevrolet C10, N/A
• Fits 1978-1986 Chevrolet C10 Suburban, N/A
• Fits 1978-1986 Chevrolet C20, N/A
• Fits 1978-1986 Chevrolet C20 Suburban, N/A
• Fits 1978-1986 Chevrolet C30, N/A
• Fits 1978-1986 Chevrolet G10, N/A
• Fits 1978-1988 Chevrolet G30, N/A
• Fits 1978-1986 Chevrolet K10, N/A
• Fits 1978-1986 Chevrolet K20, N/A
• Fits 1978-1986 Chevrolet K30, N/A
• Fits 1978-1986 Chevrolet K5 Blazer, N/A
• Fits 1978-1985 Chevrolet Impala, N/A
• Fits 1978-1983 Chevrolet Malibu, N/A
• Fits 1978-1980 Chevrolet Monza, N/A
• Fits 1978-1979 Chevrolet Nova, N/A
• Fits 1978-1989 Chevrolet P20, N/A
• Fits 1978-1992 Chevrolet P30, N/A
• Fits 1986-1989 Chevrolet Astro, N/A
• Fits 1979-1986 GMC C1500, N/A
• Fits 1979-1986 GMC C1500 Suburban, N/A
• Fits 1979-1986 GMC C2500, N/A
• Fits 1979-1986 GMC C2500 Suburban, N/A
• Fits 1979-1986 GMC C3500, N/A
• Fits 1979-1986 GMC G2500, N/A
• Fits 1979-1986 GMC K1500, N/A
• Fits 1979-1986 GMC K2500, N/A
• Fits 1979-1986 GMC K2500 Suburban, N/A
• Fits 1979-1986 GMC K3500, N/A
• Fits 1979-1980 GMC G3500, N/A
• Fits 1979-1980 GMC P1500, N/A
• Fits 1979-1990 GMC P3500, N/A
• Fits 1987-1989 GMC R3500, N/A
• Fits 1987-1989 GMC V3500, N/A
• Fits 1987-1989 GMC R2500, N/A
• Fits 1987-1987 GMC V2500, N/A
• Fits 1984-1986 Jeep Cherokee, N/A
• Fits 1986 Jeep Comanche, N/A
• Fits 1984-1986 Jeep Wagoneer, N/A
• Fits 1980-1983 Jeep CJ5, N/A
• Fits 1980-1983 Jeep CJ7, N/A
• Fits 1981-1983 Jeep Scrambler, N/A
• Fits 1978-1987 Buick Regal, N/A
• Fits 1977-1985 Buick Century, N/A
• Fits 1977-1985 Buick LeSabre, N/A
• Fits 1978-1985 Buick Riviera, N/A
• Fits 1978-1980 Buick Skyhawk, N/A
• Fits 1978-1979 Buick Skylark, N/A
• Fits 1978-1987 Oldsmobile Cutlass Supreme, N/A
• Fits 1978-1987 Oldsmobile Cutlass Salon, N/A
• Fits 1978-1985 Oldsmobile Delta 88, N/A
• Fits 1981-1985 Oldsmobile Cutlass Ciera, N/A
• Fits 1981-1985 Oldsmobile Toronado, N/A
• Fits 1981-1985 Oldsmobile 98, N/A
• Fits 1978-1986 Pontiac Bonneville, N/A
• Fits 1978-1987 Pontiac Grand Prix, N/A
• Fits 1983-1986 Pontiac Parisienne, N/A
• Fits 1978-1981 Pontiac Catalina, N/A
• Fits 1978-1981 Pontiac Grand LeMans, N/A
• Fits 1978-1981 Pontiac LeMans, N/A
• Fits 1978-1980 Pontiac Grand Am, N/A
• Fits 1978-1980 Pontiac Sunbird, N/A
• Fits 1978-1980 Pontiac Phoenix, N/A
• Fits 1980-1982 Cadillac DeVille, N/A
• Fits 1981-1982 Cadillac Eldorado, N/A
• Fits 1980-1982 Cadillac Fleetwood, N/A
• Fits 1981-1982 Cadillac Seville, N/A
• Fits 1992 Cadillac Brougham, N/A
• Fits 1981-1985 Lincoln Town Car, N/A
• Fits 1982-1985 Lincoln Continental, N/A
• Fits 1990-1992 Lincoln Mark VII, N/A
• Fits 1984-1985 Lincoln Mark VII, N/A
• Fits 1980-1983 Lincoln Mark VI, N/A
• Fits 1978-1980 Lincoln Versailles, N/A
• Fits 1990-1991 Ford LTD Crown Victoria, N/A
• Fits 1978-1986 Ford LTD, N/A
• Fits 1978-1982 Ford Fairmont, N/A
• Fits 1978-1980 Ford F-100, N/A
• Fits 1978-1983 Ford E-100 Econoline, N/A
• Fits 1978-1983 Ford E-100 Econoline Club Wagon, N/A
• Fits 1978-1985 Mercury Capri, N/A
• Fits 1978-1982 Mercury Marquis, N/A
• Fits 1978-1982 Mercury Zephyr, N/A
• Fits 1978-1988 Mercury Grand Marquis, N/A
• Fits 1978-1980 Mercury Monarch, N/A
• Fits 1978-1985 Oldsmobile Cutlass Supreme, N/A
• Fits 1978-1985 Oldsmobile Delta 88, N/A
• Fits 1978-1985 Oldsmobile Cutlass, N/A
• Fits 1978-1985 Oldsmobile Starfire, N/A
• Fits 1978-1985 Chevrolet El Camino, N/A
• Fits 1978-1985 Chevrolet Bel Air, N/A
• Fits 1978-1985 Chevrolet Monte Carlo, N/A
• Fits 1978-1985 Chevrolet P10, N/A
• Fits 1978-1984 Dodge B150, N/A
• Fits 1978-1984 Dodge B250, N/A
• Fits 1978-1984 Dodge D150, N/A
• Fits 1978-1984 Dodge D250, N/A
• Fits 1978-1984 Dodge W150, N/A
• Fits 1978-1984 Dodge Ramcharger, N/A
• Fits 1981-1984 Dodge B150, N/A
• Fits 1981-1984 Dodge B250, N/A
• Fits 1981-1984 Dodge D150, N/A
• Fits 1981-1984 Dodge D250, N/A
• Fits 1981-1984 Dodge W150, N/A
• Fits 1978-1983 Chrysler LeBaron, N/A
• Fits 1979-1981 Chrysler Newport, N/A
• Fits 1978-1981 Chrysler Town & Country, N/A
• Fits 1982 Chrysler New Yorker, N/A
• Fits 1983 Chrysler Fifth Avenue, N/A
• Fits 1981-1983 Plymouth PB150, N/A
• Fits 1981-1983 Plymouth PB250, N/A
• Fits 1978-1981 Dodge Aspen, N/A
• Fits 1978-1980 Dodge B100, N/A
• Fits 1978-1980 Dodge B200, N/A
• Fits 1978-1980 Dodge B300, N/A
• Fits 1978-1980 Dodge D200, N/A
• Fits 1978-1980 Dodge Ramcharger, N/A
• Fits 1978-1980 Dodge W200, N/A
• Fits 1978-1979 Dodge D100, N/A
• Fits 1978-1978 Dodge D300, N/A
• Fits 1978-1978 Dodge Monaco, N/A
• Fits 1978-1978 Dodge W300, N/A
• Fits 1978-1980 GMC G1500, N/A
• Fits 1978-1978 GMC G15, N/A
• Fits 1978-1978 GMC G25, N/A
• Fits 1978-1978 GMC G35, N/A