/live/media/NG/NG_5258_Fro.jpg)
Will it fit your vehicle?
Confirm before you buy. Free return shipping if it doesn't fit.
NGK 5258 Spark Plug
| Brand | NGK 5258 |
|---|---|
| Resistance | 5000 |
| Ground Electrode Tip Design | Taper cut |
| Ground Configuration | Standard |
| Ground Electrode Core Material | Nickel |
| Electrical Terminal Type | Non-removable nut |
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Iridium |
| Pre-Gap Size | .036 |
| Ground Electrode Quantity | 1 |
| Hex Size | 5/8 |
| Insulator Height | 50.50 |
| Manufacturer Heat Range | 8 |
| Seat Type | Flat |
| Reach | .75 |
| Thread Diameter | 10.00 |
| Part Number | Cr8eib-9 |
| Stock Number | 5258 |
| Product line | Laser Iridium Spark Plug |
| Fits | Ferrari · 3 vehicles |
Laser Iridium design. Iridium center electrode supports consistent ignition performance.
OE-style specification. Built to original equipment standards for the listed application.
Precise plug setup. Includes a 0.036 pre-gap and flat seat construction.
Cross-references NGK 5258 and 09482-00594 for the same application. See all 2.
Will it fit your vehicle?
Free return shipping if it doesn't fit.
Laser Iridium Spark Plug Overview
The NGK Laser Iridium Spark Plug 5258 is built for precise ignition performance and OE-style serviceability. It features an iridium center electrode, nickel ground electrode, and a 0.036 pre-gap for consistent spark delivery. Compatible with Ferrari F40 applications listed below, this spark plug is a direct-fit option for owners looking for the correct replacement specification.
Key Features
- Laser Iridium design with an iridium center electrode for stable ignition performance.
- Copper core center electrode and nickel ground electrode for balanced heat transfer and durability.
- 0.036 pre-gap and 5000 resistance for controlled spark output.
- Flat seat, 10.00 mm thread diameter, and 0.75 reach for the specified application.
- NGK part number 5258, also identified as CR8EIB-9.
Detailed Description
NGK 5258 is a Laser Iridium spark plug engineered to match the original equipment standards expected in performance and specialty applications. The tapered-cut ground electrode, standard ground configuration, and non-removable nut terminal support reliable ignition contact, while the iridium tip helps maintain consistent firing characteristics over service life. This part cross-references 09482-00594 for the same application. For buyers searching for a Ferrari F40 spark plug replacement, NGK 5258 provides the specified dimensions and electrode construction needed for proper fitment.
What It Helps Address
- Misfires caused by worn or incorrect spark plug construction.
- Hard starting related to weak or inconsistent spark delivery.
- Rough idle from degraded ignition performance.
- Loss of throttle response from improper plug gap or heat range.
- Service replacement needs for the listed Ferrari F40 applications.
Installation Notes and Tips
Fits 1990-1992 Ferrari F40, N/A. Verify thread diameter, reach, seat type, and pre-gap before installation. Use the specified gap and follow the vehicle service procedure for torque and ignition system inspection. Confirm NGK 5258 and CR8EIB-9 against the removed plug or service data before final installation.
Quality Assurance
NGK is a major OE spark plug supplier in North America with more than 80 years of automotive manufacturing experience. The brand emphasizes original equipment standards, durability, and operational performance in its spark plug production.
| Year | Make | Model | Liters | Cylinders | Notes |
|---|---|---|---|---|---|
| 1992 | Ferrari | F40 | 2.9L | V8 | Gap 0.036"; OE Equivalent Design; Laser Iridium Spark Plug |
| 1991 | Ferrari | F40 | 2.9L | V8 | Gap 0.036"; OE Equivalent Design; Laser Iridium Spark Plug |
| 1990 | Ferrari | F40 | 2.9L | V8 | Gap 0.036"; OE Equivalent Design; Laser Iridium Spark Plug |
| No rows match your filter. | |||||