Description
The NGK 2635 GR4 V-Power Spark Plug is built to deliver dependable ignition performance, long service life, and improved combustion efficiency. Its V-cut center electrode directs the spark toward the edge of the electrode, helping the flame kernel develop more quickly for increased ignitability and reduced quenching.
Designed with a copper core for efficient heat removal and a projected nickel center electrode, this spark plug supports consistent performance across a broad range of older domestic, import, and classic vehicle applications. Trivalent metal plating helps resist corrosion and seizing, while corrugated ribs reduce the risk of flashover. Triple seals help prevent leakage for reliable combustion chamber sealing.
This spark plug is a solid OE-style replacement for maintenance, restoration, and routine tune-up work.
Features:
- V-cut center electrode for faster spark development and improved ignitability
- Copper core aids heat dissipation for consistent performance
- Trivalent metal plating resists corrosion and seizing
- Corrugated ribs help prevent flashover
- Pure alumina silicate ceramic insulator improves strength and heat transfer
- Triple seals help prevent leakage
- Pre-gapped at 0.039" (1.0mm)
- Solid terminal design
Specifications:
Shell
- Thread Diameter: 14mm
- Thread Pitch: 1.25mm
- Seat Type: Gasket
- Reach: 19mm (3/4")
- Hex Size: 13/16" (21mm)
- Terminal Type: Solid
- Overall Height: ISO
- Gap: 0.039" (1.0mm)
Center Electrode
- Material: Nickel
- Type: V-Cut
- Size: 2.5mm
- Projection: Projected
Ground Electrode
- Material: Nickel
- Type: Standard
- Quantity: 1
Additional Specifications
- Resistor: Yes
- Resistor Value: 5k Ohm
- Heat Range: 4
Torque Specs
- Cast Iron: 18–25.3 lb-ft
- Aluminum: 18–21.6 lb-ft
Part Information
- Brand: NGK / NTK
- Warranty: 60 Days
- Longevity: 30,000 Miles
Fitment
Fits a wide range of applications, including select models from:
- American Motors
- Bentley
- Buick
- Cadillac
- Checker
- Chevrolet
- Chrysler
- Dodge
- GMC
- International
- Jeep
- Mercury
- Oldsmobile
- Plymouth
- Pontiac
- Rolls-Royce
Common applications include select classic and vintage cars, trucks, vans, wagons, and SUVs from the 1950s through the 1990s.
Verify vehicle year, make, model, engine, and application before ordering.
