ACDelco R44T Conventional Spark Plug Pack of 8 — Copper Core, RFI Suppressor for Auto & Marine

The ACDelco R44T Professional Conventional Spark Plug (Pack of 8) is a durable, copper-core spark plug designed for reliable ignition in automotive and approved marine applications.

Built to deliver consistent spark performance and long life, this conventional plug combines a copper core for efficient heat transfer with a nickel-chrome sheathed center electrode to resist corrosion. Its ribbed suppressor seal reduces radio-frequency interference and helps prevent flash-over, making it suitable where dependable combustion and electrical noise suppression are important. Supplied in a pack of eight, the R44T is ready for multi-cylinder tune-ups and scheduled maintenance.

What materials and construction make this spark plug dependable?

The R44T uses a copper core that promotes effective heat conduction from the firing tip to the plug body, which helps keep temperatures in the intended operating range. A nickel-chrome alloy sheathing protects the center electrode from corrosive environments, especially important for vehicles used near saltwater. The combination balances thermal management with corrosion resistance to extend usable life.

• Copper core for superior heat transfer and thermal stability
• Nickel-chrome alloy sheathing to resist electrode corrosion
• Robust conventional design for straightforward installation and service

How does the plug prevent misfires and electrical interference?

This spark plug includes a ribbed suppressor seal that reduces the chance of spark flash-over along the insulator surface and lowers radio-frequency interference (RFI) generated during ignition. Fewer unintended discharge paths mean more consistent spark delivery at the electrode and improved ignition reliability, particularly in older or sensitive electrical systems.

• Ribbed suppressor seal minimizes flash-over and misfire risk
• Integrated RFI suppression helps protect vehicle electronics and audio
• Stable spark behavior contributes to smoother starts and idle

Is this spark plug suitable for marine use and high-moisture environments?

Yes — the R44T is listed as available for marine applications, with materials chosen to stand up to higher humidity and salt exposure encountered near watercraft. The nickel-chrome sheathing and secure seal design reduce corrosion and leakage paths, making it a practical option where both road and marine durability are needed.

• Approved for certain marine installations where conventional plugs are specified
• Corrosion-resistant sheathing helps in wet or salty conditions
• Proper plug gap and torque still required for safe marine operation

What should I know before replacing my spark plugs with the R44T?

Confirm compatibility with your engine by checking the vehicle or equipment manufacturer’s spark plug specifications, gap, and heat range. Install following recommended torque values and use an appropriate gap setting if the plug is not pre-gapped. Regular inspection during tune-ups helps you identify signs of wear or improper engine conditions that may affect plug life.

• Verify thread size, reach, and heat range against OEM specs
• Set or confirm the electrode gap before installation when required
• Use the correct torque to avoid damage to the plug or engine threads

Who is this for: Technicians, DIY mechanics, and boat owners who need a reliable, conventional spark plug for routine maintenance will appreciate the ACDelco R44T. It’s a practical choice for multi-cylinder tune-ups where copper-core thermal properties, corrosion resistance, and RFI suppression are priorities. Choose this pack of eight when you’re servicing a full engine or keeping a spare set for seasonal work.