1986-1987 C4 ACDelco Professional Conventional Spark Plug
There's a number of signs your Corvette could use a spark plug change - trouble starting, hesitating, cutting out, sluggish engine performance, loss of engine power, decreased fuel economy, lack of acceleration or loss of speed under load, just to name a few! When it's time for a change, this 1986-1987 C4 ACDelco Professional Conventional Spark Plug is the perfect choice for reliable performance.
Each plug is pre-gapped to 0.89mm (but it never hurts to double check before installation) and features a high quality copper core, black onyx coating, and a ribbed suppressor seal that all help deliver a hot spark while protecting your new plugs from corrosion and the corrosive environment of the combustion chamber. Get your Corvette firing and running smoothly with the dependable performance only ACDelco plugs can provide!
- Fits Late 1986-1987 Corvettes
- Fits L98 Engines with Aluminum Cylinder Heads Only
- Sold Individually
- Approximate Resistor Value: 2-20 k ohms
- Hex Size: 5/8"
- Insulator Height: 2.007"
- Length: 4.16"
- Width: 3.59"
- Pre-Gapped to 0.89mm
- Reach: 3/4"
- Resistance: 11000 KOhms
- Seat Type: Gasket
- Thread Diameter: 14mm
- Reliable, Efficient Performance
- Direct Replacement
- High Quality Copper Core
- Outstanding Suppression Characteristics
- Improved Heat Transfer
- Improved Resistance to Low Speed Carbon Fouling
- Hot-Tip Insulator Heats Fast & Fires Hot
- Nickel-Chrome Alloy on Ground & Center Electrode
- Single Prong Electrode
- Black Onyx Coating Helps Reduce Corrosion
- Ribbed Suppressor Seal Extends Resistance & Helps Prevent Spark "Flash Over" & Misfires
- Manufacturer 24 Month/Unlimited Miles Limited Warranty
NOTE: For optimal performance, it is always recommended to change all 8 spark plugs at the same time.
Also known under these part numbers: (For reference only)