More Information for ACDELCO 4
{Alternate Inventory Numbers: 19145286, 25164642, 19307141, 19238455}
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ACDELCO 4 Specifications
Approximate Resistor Value (k ohms)6-15k ohms
Center Electrode Core MaterialCopper
Center Electrode DesignStandard
Center Electrode Tip MaterialPlatinum
Core Nose Length (IN)0.560
Electrical Terminal TypeNon-Removable Nut
Ground ConfigurationStandard
Ground Electrode Core MaterialNickel
Ground Electrode Tip DesignStandard
Ground Electrode Tip MaterialNickel
Height (IN)5.1
Hex Size (MM)20.8
Hex TypeHex
Indicated Mean Effective Pressure (IMEP)300
Insulator Height (in)2.303
Insulator Height (mm)58.5
Length (IN)9.15
Manufacturer Heat Range8
Pre-Gap Size (IN)0.041
Pre-Gap Size (MM)1.050
Reach (IN)0.75
Reach (mm)19.1
Resistor TypeYes
Seat TypeFlat
Thread Diameter (IN)0.551
Thread Diameter (MM)14.0
Washer IncludedNo
Weight (lb)9.95
Width (IN)9.85
Professional; Rapidfire; Pre-Set Gap: 0.041"
ACDelco Platinum Rapidfire® Spark Plugs are designed for everyday use and are a high quality replacement ideal for many vehicles on the road today. These spark plugs have high-quality suppressors that help prevent misfiring, an optimized plug to boot seal, and a pure copper core for great durability.

Features & Benefits:
  • Solid state suppressor, with two-piece glass and brass seal, can help reduce radio frequency interference, regulates spark energy for long electrode life, and helps protect against high combustion pressures
  • Pure copper core provides great heat transfer and helps maximize plug durability
  • Platinum on center electrode enables superior spark characteristics and can reduce voltage requirements of the ignition system
  • Ribless insulator helps optimize plug to boot seal
  • Fits engines that run conventional plugs, as well as newer vehicles that require platinum plugs
Which ACDELCO Spark Plug Is Right For You?

Material / Series Lifespan / Durability Performance / Ignitability Efficiency / Fuel Economy
Copper / Nickel
Platinum Rapidfire
★★ ★★ ★★
Double Platinum
Double Platinum
★★★★ ★★ ★★
★★★ ★★★★ ★★★
ACDelco Quality

ACDelco breaks down their premium portfolio of Original Equipment and Aftermarket parts into two tiers: GM Original Equipment and ACDelco Gold.

GM Original Equipment parts are the true OE parts installed during production or validated by GM—designed, engineered, and tested to rigorous standards and backed by General Motors.
ACDelco Gold parts are the high-quality alternative to OE parts, manufactured to meet GM expectations for fit, form, and function and backed by General Motors.

Warranty Information:
3 Years
Warranty Details