Denso 4716 Spark Plug

Denso Iridium TT Spark Plug 4716

The Denso Iridium TT 4716 spark plug combines OE-style durability with a performance-focused electrode design. It is built for drivers who want stable ignition, consistent combustion, and dependable service in a wide range of classic GM, Ford, Chrysler, and import applications.

Key Features

• Iridium center electrode tip for precise spark delivery
• Platinum twin-tip ground electrode design for consistent ignition performance
• Copper center electrode core and nickel ground electrode core
• 5000 ohm resistance for ignition system compatibility
• 1.0 mm pre-gap size
• Tapered seat, 14.00 mm thread diameter, 11.60 mm reach, and 16.0 mm hex size
• Manufacturer heat range 20

Product Details

Denso Iridium TT 4716 is part of the Iridium TT line, which pairs an iridium-tipped center electrode with a twin-tip ground design to support reliable spark formation and steady engine operation. The construction reflects an OE-style plug format while adding the electrode materials and geometry associated with improved power and torque response. This part number 4716 is used across many older Chevrolet, Ford, and GMC platforms, including applications such as Chevrolet Camaro, Ford F-150, and GMC Yukon.

This part cross-references DENSO Auto Parts ITF20TT for the same application.

Common Uses

• Restoring weak spark or inconsistent ignition performance
• Addressing rough idle caused by worn plug electrodes
• Replacing plugs with excessive gap growth or carbon buildup
• Supporting smoother combustion in high-mileage engines
• Maintaining ignition reliability in compatible Chevrolet, Ford, and GMC vehicles

Installation Notes

Verify thread diameter, reach, seat type, and heat range before installation. Confirm the specified gap and inspect ignition wires, coils, and distributor components for wear before installing the new plug. Use the vehicle service manual for torque and service procedures, especially on older engines with tapered-seat spark plug requirements.

Quality Assurance

Denso manufactures this spark plug as an OE-style replacement with performance-oriented electrode materials and a durable construction intended for long service life in the listed applications.