NGK 2316 Spark Plug

NGK Iridium IX Spark Plug for Ferrari V12 Applications

The NGK Iridium IX Spark Plug, part number 2316, is built for precise ignition performance in select Ferrari applications. It uses an iridium center electrode, copper core, and a 5,000 ohm resistor to support stable spark delivery and consistent combustion.

Key Features

• Iridium center electrode tip material for focused spark performance
• Copper center electrode core material for efficient heat transfer
• 5,000 ohm resistance for ignition system noise suppression
• Taper-cut ground electrode tip design with standard ground configuration
• Pre-gapped at .032 inch with a flat seat and 12 mm thread diameter
• 5/8 hex size, .75 inch reach, and removable nut terminal type
• Manufacturer heat range 9 for select high-performance engine applications

Product Details

NGK’s Iridium IX line is engineered around fine-wire iridium construction and OE-style fitment standards, making it a strong choice for Ferrari owners who need accurate ignition characteristics and dependable service life. Part number 2316, also identified as DCPR9EIX, is listed for a range of Ferrari V12 models including the 512 TR, 512 M, 456 GT, 456 GTA, 456 M, 550 Maranello, 575 M Maranello, 612 Scaglietti, and Superamerica. This spark plug is specified with a .028 inch gap for the listed Ferrari applications, so final gap verification should match the vehicle’s service specification before installation.

This part cross-references DENSO Auto Parts 5337 for the same application.

What It Helps Address

• Misfire concerns caused by worn or eroded spark plug electrodes
• Hard starting from weak or inconsistent ignition output
• Rough idle related to degraded spark quality
• Loss of throttle response from inefficient combustion
• Maintenance replacement for select Ferrari ignition service intervals

Installation Notes and Tips

Verify the vehicle application before installation and confirm the specified gap for the exact Ferrari model. For the listed fitments, use a .028 inch gap rather than the .032 inch pre-gap shown in the product attributes. Inspect the ignition system, threads, and sealing surfaces during service, and follow the manufacturer’s torque and service procedures for the engine.

Quality Assurance

NGK is a long-established OE supplier with broad coverage across domestic and import vehicles, motorcycles, marine engines, and small engine applications. The brand’s manufacturing and distribution network supports consistent product standards for ignition service.