8 Pack - ACDelco MR43T Copper Spark Plug - For Mercruiser 305 350 454 5.0L 5.7L For Sale - New and Used

Vroom PARTS Quality Parts • Secure Packaging • Fitment Help ACDelco MR43T Gold Marine Spark Plugs — Set of 8 NEW • TWO FACTORY 4-PACK BOXES • COMPLETE SET OF 8 • SAME-DAY SHIPPING BrandACDelco ACDelco NumberMR43T GM Part Number19355200 Product LineACDelco Gold Marine Part TypeConventional resistor spark plug ConditionNew and unused. Outer packaging may show light shelf, storage, or handling wear. Quantity8 spark plugs total IncludedTwo ACDelco factory four-pack boxes containing four MR43T spark plugs each. No installation tools or additional ignition components are included. Specifications

• Seat: tapered
• Reach: approximately 0.43 inch / 10.95 mm
• Catalog gap: approximately 0.040 inch / 1.02 mm
• Insulator height: approximately 2.27 inches / 57.76 mm
• Manufacturer heat range: 3
• Center-electrode core: copper
• Ground-electrode core: nickel
• Ground configuration: standard single electrode
• Resistor type: yes

Product Highlights

• ACDelco Gold premium aftermarket marine spark plugs.
• Convenient eight-piece quantity supplied as two factory four-pack boxes.
• Copper center-electrode core helps provide effective heat transfer and durability.
• Nickel ground-electrode construction with a standard single-electrode design.
• Resistor construction helps suppress ignition-system electrical interference.
• Protective coating helps reduce corrosion in demanding operating environments.
• Manufactured to meet ACDelco specifications for fit, form, and function in approved applications.

Gap must be checked before installation: The catalog gap is approximately 0.040 inch, but the correct setting can vary by engine model, serial number, ignition system, fuel type, and manufacturer specification. Measure every plug and confirm the required gap in the engine or equipment service information before installation. Buyer must verify compatibility: MR43T is used in selected marine and specialty-engine applications, but it is not universal. Matching the boat, engine family, or horsepower alone may not confirm fitment. Verify ACDelco MR43T / GM 19355200, tapered seat, reach, heat range, and required gap against the original plug, engine model and serial number, parts catalog, or service manual before ordering. Buyer is responsible for confirming fitment. Before You Purchase

• Remove one original spark plug and compare its complete part number, reach, seat style, and physical dimensions.
• Confirm that your engine specifically calls for ACDelco MR43T or an approved cross-reference.
• Use the engine manufacturer's required spark-plug gap and installation torque.
• Inspect the plug wires, boots, and ignition components before installation.
• Professional installation is recommended.

Photos & Packaging

• Listing images show the product type, packaging style, and eight-piece quantity offered.
• You will receive two four-pack boxes for a total of eight ACDelco MR43T spark plugs.
• Packaging may show minor cosmetic shelf, storage, or handling wear.
• Packaging artwork and minor cosmetic details may vary by production run.

Same-Day Shipping

• Orders paid before our business-day shipping cutoff normally ship the same business day.
• Orders received after the cutoff, on weekends, or on holidays ship the next business day.
• Tracking information is provided after shipment.
• The plugs will be packed securely to help prevent ceramic, thread, and electrode damage in transit.

Warranty & Returns

• Items must be returned in their original, unused, uninstalled, and unaltered condition.
• Returns are accepted when the items are not functional or not as described.
• No labor warranty — coverage applies to the parts only.
• Packaging and security markings must match the items shipped.

Need fitment help? Send us the engine make, model, year, serial number, and the complete part number from your original spark plug.

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