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Correct plug dimensions and heat range are essential to reliable ignition and safe engine operation. NGK 3901 is built for 1995-1997 Ferrari F50, 1998-2000 Ferrari F355. Key details are box of four spark plugs and standard nickel center electrode.
Use NGK 3901 only for the applications below. Confirm every listed qualifier and exclusion.
| Years | Make | Model | Details |
|---|---|---|---|
| 1995-1997 | Ferrari | F50 | 4.7L F130B; NGK catalog-listed alternate; Excludes: Motorcycle and ATV applications are excluded from this listing |
| 1998-2000 | Ferrari | F355 | 3.5L; NGK catalog-listed alternate; Excludes: Motorcycle and ATV applications are excluded from this listing |
| Detail | Value |
|---|---|
| Brand | NGK |
| Manufacturer Part Number | 3901 |
| Product Type | Spark Plugs |
| thread | M10-1.0 |
| reach_mm | 19 |
| hex_mm | 16 |
| seat | gasket |
| gap_mm | 0.9 |
| heat_range | 7 |
| resistance_ohm | 5000 |
| center_electrode | projected nickel over copper core |
| ground_electrodes | 1 |
| terminal | threaded stud |
| upc | 087295139011 |
NGK develops spark plugs and ignition components for OE and service applications, using defined heat ranges, electrode designs, and dimensions for exact engine fitment.
It is a NGK spark plugs for 1995-1997 Ferrari F50, 1998-2000 Ferrari F355, built around Box of four spark plugs.
What is the main benefit of this part?Box of four spark plugs; Standard nickel center electrode.
Which applications does it fit?It is intended for 1995-1997 Ferrari F50, 1998-2000 Ferrari F355. Use the Fitment table and every listed qualifier before ordering.
What comes with this product?four NGK CPR7EA-9 spark plugs.
What construction details should I know?projected nickel over copper core; 1.
What should be checked before installation?Compare the old and new parts, confirm position and orientation, and verify all application notes, clearances, fasteners, and required companion parts.
How should this part be installed?Verify the exact Ferrari engine and alternate-plug listing. Follow all torque, alignment, bleeding, calibration, or break-in procedures that apply.
What warranty applies?1-year limited warranty shown by O'Reilly.
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