Fitment Information:
1998-2001 Subaru Impreza 2.5RS
Features:
- Sold as a set of four spark plugs
- Trivalent metal plating provides superior anti-corrosion and anti-seizing properties
- Corrugated ribs prevent flashover
- Pure alumina silicate ceramic insulator, provides superior strength and better heat transfer
- Copper core aids in heat removal
- Longevity: 50k Miles
- 60 Days manufacturer Warranty
Shell
Spark Plug Thread Diameter: 14mm
Thread Pitch: 1.25mm
Seat Type: Flat
Reach: 19mm (3/4")
Wrench Diameter: 5/8" (16mm)
Terminal Type: Solid
Gap: .043" (1.1mm)
Center Electrode
Electrode Tip Material: Iridium
Electrode Core Material: Copper
Ground Electrode
Material: Nickel
Type: Standard
Shape: Taper Cut
Specifications
Resistor: Yes
Resistor Value: 5k Ohm
Manufacturer Heat Range: 6
Torque Specs: Cast Iron: 18-25.3 lb. ft. Aluminum: 18-21.6 lb. ft.
Iridium spark plugs are more durable and have a higher melting point compared to platinum plugs. Enjoy the benefits of reduced corrosion, improved ignition, superior anti-fouling, and a lower required voltage. These NGK plugs will get you running smoother and making more power through increased efficiency and increased heat resistance.
Note: Iridium plugs are able to use larger gap setting with less voltage. Some customers choose to re-gap these plugs to correct misfiring or tune for optimal spark -- do so at your own risk -- a slide-type plug gapper can damage the fragile iridium tip.
Import Image Racing is an authorized dealer for NGK Spark Plugs. Purchasing from us guarantee's that your NGK products are always authentic and covered by manufacturer warranty.