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Denso 5361 Spark Plug
| Brand | Denso 5361 |
|---|---|
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Iridium |
| Ground Configuration | Standard |
| Ground Electrode Core Material | Nickel |
| Ground Electrode Quantity | 1 |
| Ground Electrode Tip Design | Tapercut, U-Groove |
| Hex Size | 16.0 |
| Manufacturer Heat Range | 22 |
| Pre-Gap Size | 0.9 |
| Reach | 19.00 |
| Resistance | 5000 |
| Seat Type | Flat |
| Thread Diameter | 14.00 |
| Product line | Iridium Power |
| Fits | Yamaha, Arctic Cat, Kawasaki, Aprilia, KTM, KYMCO, Suzuki, VOR, Husqvarna, and Ferrari · 12 vehicles |
Iridium Power. Performance-focused spark plug line with a 0.4 mm iridium center electrode.
Tapercut, U-Groove. Ground electrode design promotes efficient spark delivery.
Copper core. Copper center electrode core helps conduct heat effectively.
Cross-references DENSO Auto Parts IU22 for the same application. See all 1.
Denso Iridium Power Spark Plug for Ferrari
The Denso Iridium Power 5361 spark plug is built for precise ignition performance in high-output engines. Its 0.4 mm iridium center electrode and tapercut U-groove ground design support efficient spark delivery for select Ferrari applications, including the F355 and F50.
Key Features
- Iridium center electrode tip material for focused spark performance
- World’s smallest 0.4 mm iridium center electrode design, per manufacturer description
- Tapercut, U-groove ground electrode tip design
- Nickel ground electrode core with copper center electrode core
- 5000 ohm resistance
- Flat seat, 14.00 mm thread diameter, 19.00 mm reach
- Pre-gapped to 0.9 mm
- Compatible with select Ferrari F355, F355 Spider, F355 F1, F355 GTS, and F50 applications
Product Details
Denso Iridium Power 5361 is part of the Iridium Power line, a product family focused on fine-wire iridium electrode construction for consistent ignition response. This spark plug uses a 16.0 mm hex, flat seat design, and a manufacturer heat range of 22. The combination of iridium center electrode, copper core, and tapercut U-groove ground electrode is engineered for stable spark formation in performance-oriented engines. This part cross-references DENSO Auto Parts IU22 for the same application.
Fits 1999 Ferrari F355, N/A. Fits 1996-1999 Ferrari F355 Spider, N/A. Fits 1998 Ferrari F355 F1, N/A. Fits 1995-1998 Ferrari F355 GTS, N/A. Fits 1996-1997 Ferrari F50, N/A.
Common Replacement Reasons
- Misfire under load
- Rough idle or inconsistent combustion
- Hard starting or delayed ignition response
- Worn or fouled spark plug electrodes
- Loss of throttle response in performance driving
Installation Notes
Verify the thread diameter, reach, seat type, and pre-gap before installation. Use the specified torque procedure for the cylinder head material and confirm the ignition system is in good condition before replacing plugs. For Ferrari F355 and Ferrari F50 applications, match the plug specification to the engine requirements listed by the vehicle manufacturer.
Quality Assurance
Denso manufactures the Iridium Power line with fine-wire iridium electrode construction and application-specific specifications for performance ignition service. Part number 5361 is built to the listed dimensions and electrical characteristics for the confirmed Ferrari fitments above.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1999 | Ferrari | F355 | N/A | Iridium Power |
| 1999 | Ferrari | F355 Spider | N/A | Iridium Power |
| 1998 | Ferrari | F355 F1 | N/A | Iridium Power |
| 1998 | Ferrari | F355 GTS | N/A | Iridium Power |
| 1998 | Ferrari | F355 Spider | N/A | Iridium Power |
| 1997 | Ferrari | F355 GTS | N/A | Iridium Power |
| 1997 | Ferrari | F355 Spider | N/A | Iridium Power |
| 1997 | Ferrari | F50 | N/A | Iridium Power |
| 1996 | Ferrari | F355 GTS | N/A | Iridium Power |
| 1996 | Ferrari | F355 Spider | N/A | Iridium Power |
| 1996 | Ferrari | F50 | N/A | Iridium Power |
| 1995 | Ferrari | F355 GTS | N/A | Iridium Power |
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