Denso 4719 Spark Plug

Denso Iridium TT Spark Plug 4719

Denso Iridium TT 4719 is a tapered-seat spark plug built for OE-style durability with a performance-focused firing design. It combines iridium at the center electrode with a platinum twin-tip ground electrode to support consistent ignition, strong throttle response, and long service life.

Key Features

• Iridium center electrode tip for precise spark delivery
• Platinum Twin-Tip ground electrode design for stable ignition performance
• Copper core center electrode and nickel ground electrode core for heat transfer and durability
• 5000 ohm resistance for controlled electrical performance
• Pre-gapped at 1.0 mm for direct replacement use
• Tapered seat, 14 mm thread diameter, 25.00 mm reach, and 16.0 mm hex size
• Manufacturer heat range 20

Product Details

The Denso Iridium TT line is engineered to blend OE-style durability with a more responsive spark event. Part number 4719 uses a 0.4 mm iridium center electrode and a 0.7 mm platinum twin-tip ground design to promote efficient combustion and dependable ignition performance. This makes it a strong choice for drivers servicing Ford F-150, Ford Mustang, Ford Explorer, and Ford Transit applications, along with select Buick, Chevrolet, Lincoln, Mazda, and Land Rover vehicles.

This part cross-references DENSO Auto Parts ITV20TT for the same application.

What It Helps Address

• Rough idle caused by worn spark plug electrodes
• Hard starting from weak or inconsistent spark output
• Misfire conditions related to aged ignition components
• Reduced throttle response from inefficient combustion
• Maintenance intervals shortened by standard copper plug wear

Installation Notes and Fitment Tips

Verify engine application by year, make, and model before installation. Fits 2017-2022 Ford F-150, N/A; Fits 2018-2023 Ford Mustang, N/A; Fits 2018-2022 Ford Explorer, N/A; Fits 2017-2023 Ford Transit-150, N/A; Fits 2017-2023 Ford Transit-250, N/A; Fits 2017-2023 Ford Transit-350, N/A; Fits 2017-2023 Ford Transit-350 HD, N/A; Fits 2018-2022 Ford Escape, N/A; Fits 2018-2022 Ford EcoSport, N/A; Fits 2020-2022 Lincoln Corsair, N/A; Fits 2021-2023 Chevrolet Traverse, N/A; Fits 2021-2023 Buick Enclave, N/A. Some applications in the fitment data note two spark plugs per cylinder; follow the vehicle service specification for the exact engine configuration. Use the listed tapered seat and thread dimensions to confirm cylinder head compatibility.

Quality Assurance

Denso manufactures the Iridium TT line with OE-style construction and performance-oriented electrode materials. The combination of iridium, platinum twin-tip geometry, and copper-core design supports consistent ignition performance across a wide range of late-model Ford, Lincoln, Chevrolet, Buick, Mazda, Jaguar, and Land Rover applications.