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Mercury Custom Spark Plug

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  • Top Sellers

Mercury Custom NGK V-Power 2438 Resistor Spark Plug - Copper Electrode Core Electrode Core, Nickel alloy Electode Tip Electrode Tip, 10.9 mm Reach 18 ...

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NGK WR5 V-POWER SPARK PLUG, SOLD INDIVIDUALLY

NGK V-Power Spark Plug has a unique V-power design that directs the spark to the edge of the electrode where it develops more rapidly to improves ignitability than OE manufacturer and racer approved.

Specifications:
  • 18 mm thread size
  • 10.9 mm reach
  • 20.6 mm hex size
  • Tapered seat style
  • Resistor plug type
  • Solid terminal nut
  • Projected tip
  • V-grooved centered electrode
  • Nickel alloy tip
  • One ground strap quantity
  • Heat range 5

Features:
  • Increases ignitability even in lean burn conditions and lowers ignition system voltage requirements
  • Increases fuel economy and lower emissions
  • Trivalent metal plating has superior anti-corrosion and anti-seizing properties
  • Highly durable against electrical and chemical wear


  • Brand SKU#: NGK 2438
  • Reach: 10.9 mm Reach
  • Thread Size: 18 mm Thread Size
  • Electrode Core Material: Copper Electrode Core
  • Recommended Use: OE Replacement
  • Product Fit: Direct Fit
  • Quantity Sold: Sold Individually
  • Heat Range: 5
  • Plug Type: Resistor
  • Warranty: 60-day NGK limited warranty
  • Notes: 5/8 in. hex size; Projected tip; Solid terminal type; Tapered seat style; Ships to U.S. addresses only. Cannot be shipped internationally.
  • Anticipated Ship Out Time: 1-2 Business Days
  • Spark Plug Code: WR5
  • Electrode Tip Material: Nickel alloy Electode Tip
  • Gap Size: 1 mm
  • Series: NGK V-Power
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Fits the following Mercury Custom Years

  • 1955 | Base | 8 Cyl 4.8L
  • 1956 | Base | 8 Cyl 5.1L
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Mercury Custom Denso Standard 5013 Resistor Spark Plug - Copper Electrode Core Electrode Core, Electrode Tip, 11.6 mm Reach 18 mm Thread Size Thread S...

$3.38 $7.36 You Save $3.98 (54%)
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DENSO REGULAR CLASS TRADITIONAL SPARK PLUG, SOLD INDIVIDUALLY -- 18 mm thread, 11.6 mm reach, 13/16 in. hex size, tapered seat, resistor type, removable terminal, projected tip, U-groove ground electrode, 0.027 in. gap size, 20 heat range; Designed with heavy duty insulator that provides unparalleled dielectric strength and thermal conductivity under extreme temperatures; The five-rib design prevents flashover while decreasing voltage loss; Its copper glass seal bonds the center electrode and insulator together for a gas-tight seal; Features a platinum center electrode that utilizes platinum to shrink the surface area of the center electrode tip for maximum firing performance and minimum voltage requirements; The platinum ground electrode resists gas and electrical erosion and corrosion extending service intervals to 60,000 miles.
  • Brand SKU#: Denso 5013
  • Reach: 11.6 mm Reach
  • Thread Size: 18 mm Thread Size
  • Electrode Core Material: Copper Electrode Core
  • Recommended Use: OE Replacement
  • Product Fit: Direct Fit
  • Quantity Sold: Sold Individually
  • Heat Range: 20
  • Plug Type: Resistor
  • Warranty: 1-year Denso limited Warranty
  • Notes: 13/16 in. hex size; Projected tip; Removable nut terminal type; Gasket seat style; Machine rolled threads; U-Groove electrode configuration
  • Anticipated Ship Out Time: Same day - 1 business day
  • Spark Plug Code: MA20PR-U
  • Gap Size: 0.7 mm
  • Series: Denso Standard
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Fits the following Mercury Custom Years

  • 1955 | Base | 8 Cyl 4.8L
  • 1956 | Base | 8 Cyl 5.1L
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Mercury Custom AC Delco Professional Conventional R85TS Resistor Spark Plug - Copper Electrode Core Electrode Core, Nickel alloy Electode Tip Electrod...

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$3.11 $5.73 You Save $2.62 (46%)
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ACDELCO CONVENTIONAL OE REPLACEMENT SPARK PLUGS

Choose ACDelco’s Conventional OE replacement spark plugs for reliable firing and superior protection against rust and carbon fouling. Established in 1899, ACDelco manufactures original GM parts and premium OE replacement parts for other brands in the automotive aftermarket.

  • Strictly manufactured to provide reliable function
  • Copper-core electrode optimizes heat transfer and protects against carbon fouling
  • Ground and center electrode sheathing made with nickel-chrome alloy to prevent rust
  • Widespread coverage includes most older models
  • Hot-tip insulator designed for hot, rapid firing
  • Brand SKU#: AC Delco R85TS
  • Reach: 11.6 mm Reach
  • Thread Size: 18 mm Thread Size
  • Electrode Core Material: Copper Electrode Core
  • Replaces OE Number: 5613886
  • Recommended Use: OE Replacement
  • Product Fit: Direct Fit
  • Quantity Sold: Sold Individually
  • Plug Type: Resistor
  • Warranty: 24-months or unlimited mile AC Delco limited warranty
  • Notes: 13/16 in. hex size; Tapered seat style
  • Anticipated Ship Out Time: Same day - 1 business day
  • Spark Plug Code: R85TS
  • Electrode Tip Material: Nickel alloy Electode Tip
  • Gap Size: 0.035 in.
  • Series: AC Delco Professional Conventional
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Fits the following Mercury Custom Years

  • 1955 | Base | 8 Cyl 4.8L
  • 1956 | Base | 8 Cyl 5.1L
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Mercury Custom Motorcraft Suppressor SP431 Resistor Spark Plug - Copper Electrode Core Electrode Core, Copper Electode Tip Electrode Tip, 11.6 mm Reac...

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$3.52 $8.59 You Save $5.07 (59%)
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MOTORCRAFT SUPPRESSOR SPARK PLUG, COPPER, SOLD INDIVIDUALLY

0.04 in. gap size, standard service plug; Delivers maximum voltage to the spark plug while maximizing performance and increases engine life; Resists corrosion and abrasion; Reduces the chance of misfire.


  • Brand SKU#: Motorcraft SP431
  • Reach: 11.6 mm Reach
  • Thread Size: 18 mm Thread Size
  • Electrode Core Material: Copper Electrode Core
  • Replaces OE Number: BSF82C, MBSF82C
  • Recommended Use: OE Replacement
  • Product Fit: Direct Fit
  • Quantity Sold: Sold Individually
  • Heat Range: 8
  • Plug Type: Resistor
  • Warranty: 2-year or unlimited-mile Motorcraft limited warranty
  • Notes: 13/16 in. hex size; Non-projected insulator type; Tapered seat style; Standard service plug
  • Anticipated Ship Out Time: Same day - 1 business day
  • Spark Plug Code: BSF82CF6
  • Electrode Tip Material: Copper Electode Tip
  • Gap Size: 0.035 in.
  • Series: Motorcraft Suppressor
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Fits the following Mercury Custom Years

  • 1955 | Base | 8 Cyl 4.8L
  • 1956 | Base | 8 Cyl 5.1L
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Mercury Custom Champion Traditional 11 Resistor Spark Plug - Copper Electrode Core Electrode Core, Nickel alloy Electode Tip Electrode Tip, 11.6 mm Re...

$3.46 $6.85 You Save $3.39 (49%)
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CHAMPION TRADITIONAL SPARK PLUG, SOLD INDIVIDUALLY

Champion Traditional Spark Plugs have original equipment on a wide variety of engines for many years. Features nickel alloy centers and ground electrodes with reasonably good wear characteristics.

Specifications:
  • 18 mm thread diameter
  • Projected core nose

Features:
  • Made of corrosion resistant zinc plated shell with copper plus core design
  • Most durable high voltage semiconductor


  • Brand SKU#: Champion 11
  • Reach: 11.6 mm Reach
  • Thread Size: 18 mm Thread Size
  • Electrode Core Material: Copper Electrode Core
  • Recommended Use: OE Replacement
  • Product Fit: Direct Fit
  • Quantity Sold: Sold Individually
  • Heat Range: 18
  • Plug Type: Resistor
  • Warranty: 1-year Champion limited warranty
  • Notes: 13/16 in. hex size; Projected core nose tip; Tapered seat style
  • Anticipated Ship Out Time: 1-2 Business Days
  • Spark Plug Code: RF18YC
  • Electrode Tip Material: Nickel alloy Electode Tip
  • Gap Size: 0.84 mm - 0.97 mm
  • Series: Champion Traditional
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Fits the following Mercury Custom Years

  • 1955 | Base | 8 Cyl 4.8L
  • 1956 | Base | 8 Cyl 5.1L
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Mercury Custom MSD Iridium 3744 Resistor Spark Plug - Copper Electrode Core Electrode Core, Iridium Electode Tip Electrode Tip, 11 mm Reach 18 mm Thre...

$6.67 $7.41 You Save $0.74 (10%)
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Availability: In Stock, 3-4 business days
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MSD – IRIDIUM PERFORMANCE SPARK PLUGS

These MSD performance spark plugs are made from extra tough and highly conductive Iridium along with a copper core and special ceramic casing to produce a hot spark that also stays cool to avoid detonation. They’re designed specifically to work with high output ignition systems such MSD’s and you can find them on the world’s fastest vehicles. From ignitions to distributors, starters to coils, from spark plugs to plug wires, there’s an MSD product to help you get the most out of your engine.

  • Used by top fuel drag cars, off-roaders and stock cars
  • Maximizes the power of high output ignitions
  • Iridium high-conductivity produces hot ignition spark
  • Center ground strap contains Yttrium for its high heat resistance
  • Spark isolation is improved thanks to high dielectric-strength ceramics
  • Heat-transferring copper core stays cooler to last longer
  • Machined electrodes for better flame exposure, improved combustion
  • Brand SKU#: MSD 3744
  • Reach: 11 mm Reach
  • Thread Size: 18 mm Thread Size
  • Electrode Core Material: Copper Electrode Core
  • Recommended Use: Performance
  • Product Fit: Direct Fit
  • Quantity Sold: Sold Individually
  • Heat Range: 5
  • Plug Type: Resistor
  • Warranty: 1-year MSD limited warranty
  • Notes: 13/16 in. hex size; Projected insulator type; Tapered seat style; Iridium power electrode configuration
  • Anticipated Ship Out Time: 3-4 business days
  • Spark Plug Code: 16IR5Y
  • Electrode Tip Material: Iridium Electode Tip
  • Series: MSD Iridium
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Fits the following Mercury Custom Years

  • 1955 | Base | 8 Cyl 4.8L
  • 1956 | Base | 8 Cyl 5.1L
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Product Reviews

We know car parts and we know auto parts. We're here to help you find that perfect Spark Plug for your Mercury Custom. We love when auto parts experts come to our site and we love when car parts newbies come to our site. We have worked hard to design a site that caters to everyones Mercury Custom Spark Plug needs. Entering your vehicle information in our Year Make Model selector up top, helps ensure you get an auto part that fits your car, truck or other type of vehicle.

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