NGK TR5 2238 Service Pack 8 PLUGS

NGK TR5 2238 V-Power Spark Plug – Pre-Set Gap 0.040" (8 Plugs)

NGK TR5 (stock #2238) is a V-Power copper spark plug that’s a great OE-style choice for many GM and marine applications. The V-grooved nickel center electrode and copper core improve ignitability and help with easier starts, smoother idle, and cleaner combustion compared to basic economy plugs. This listing is for one set of 8 pre-gapped plugs at 0.040".

• Brand: NGK

• Series: V-Power

• Part Number: TR5

• Stock Number: 2238

• Service Number: TR5

• Product Type: Spark plug – set (8 plugs)

Electrode & Core

• Center Electrode Core Material: Copper

• Center Electrode Design: Standard

• Center Electrode Projection: Mid projection

• Center Electrode Insulator Tip Projection: 0.16" (4.0 mm)

• Center Electrode Tip Material: Nickel

• Ground Configuration: J-gap

• Ground Electrode Quantity: 1

• Ground Electrode Core Material: Nickel

• Ground Electrode Tip Design: Standard

• Ground Electrode Tip Material: Nickel

Size & Fit

• Thread Size: M14 x 1.25 (metric)

• Reach: 0.689" (17.5 mm)

• Seat Type: Tapered

• Hex Size: 5/8" (16 mm)

• Insulator Height: 2.07" (52.5 mm)

• Short Style Plug: No

• Skirt: No (0.0" skirt length)

Electrical & Heat Range

• Resistor Type: Yes

• Resistance: ~5,000 Ω

• Manufacturer Heat Range: 5

• Electrical Terminal Type: Removable nut

Gap & Setup

• Pre-Set Gap: 0.040" (1.0 mm) – always verify and adjust to your engine/tuner spec

Materials

• Insulator Material: Ceramic

• Material Grade: Nickel/Copper

Extras

• Washer Included: No (tapered-seat plug does not use a separate washer)

• Thread Type Standard: Metric

• OEM / Interchange Numbers: 103, 2223, AM132420, AR764, BPR5EFS