Denso 5035 Spark Plug

Denso 5035 Spark Plug for Select GM and Ford Applications

Denso 5035 is a conventional spark plug built for older ignition systems that need consistent firing and stable performance. Its U-Groove electrode design improves ignitability, helping support smoother combustion and efficient engine operation in a wide range of Chevrolet, GMC, Ford, and Dodge applications.

Key Features

• U-Groove ground electrode design for improved ignitability
• Copper center electrode core for dependable heat transfer
• Nickel center and ground electrode tip materials
• 5000 ohm resistor for ignition noise suppression
• Tapered seat design
• 14.00 mm thread diameter, 11.60 mm reach, 16.0 mm hex size
• Manufacturer heat range 20 with 0.9 pre-gap size

Product Details

The Denso U-Groove Conventional line is engineered for drivers who need a straightforward replacement spark plug with OE-style construction. The U-shaped ground electrode helps expose the spark to the air-fuel mixture more effectively, which can improve ignitability in engines that rely on conventional secondary ignition components. Denso 5035 is a direct-fit style spark plug for many older trucks, vans, SUVs, and passenger cars, including Chevrolet Camaro, GMC Yukon, and Ford F-150 applications listed in the fitment data. This part cross-references DENSO Auto Parts T20PR-U for the same application.

What This Spark Plug Helps Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from inconsistent spark delivery
• Misfire conditions related to aged ignition components
• Reduced combustion efficiency in high-mileage engines
• Ignition noise concerns in resistor-equipped systems

Installation Notes and Tips

Verify thread diameter, reach, seat type, and heat range before installation. Denso 5035 uses a tapered seat and 14.00 mm thread diameter, so it should be matched carefully to the cylinder head specification. Check and confirm the pre-gap against the vehicle service information before installation, and inspect ignition wires, distributor components, and coil condition when replacing plugs on older Chevrolet, GMC, and Ford engines.

Quality Assurance

Denso’s U-Groove Conventional spark plug line is built around a practical OE-style design for dependable secondary ignition service. The nickel and copper construction supports stable operation in applications that call for a conventional replacement plug.