NGK Racing Spark Plug Box of 4 (R7448A-9) - 96969

The NGK R7448A-9 Racing Spark Plug (NGK part #96969) is a purpose-built competition ignition component engineered to withstand the most grueling engine conditions on the track. Sold as a box of four plugs, this NGK Racing Series plug features a projected-nose design, pure alumina silicate ceramic insulator, and a copper core — a combination developed to maximize durability and consistent ignition in high-stress racing environments. Whether you're building a dedicated race car or preparing a high-output performance engine, the R7448A-9 is a plug trusted at racing venues around the world.

Key Features & Benefits

• Engineered for Extreme Conditions: NGK Racing Series plugs are specifically designed to withstand the harshest engine conditions, making them suitable for sustained high-RPM, high-load racing use where street plugs would fall short.
• Special Insulator Nose Configuration: The projected insulator nose design improves throttle response by placing the firing tip deeper into the combustion chamber for a more complete burn.
• Pure Alumina Silicate Ceramic Insulator: Provides superior mechanical strength and better heat transfer compared to standard ceramic materials, helping the plug survive the thermal shock of competitive motorsport.
• Copper Core for Heat Removal: The copper core aids in conducting heat away from the firing tip, supporting stable heat range management under sustained race loads.
• Corrugated Ribs Prevent Flashover: The ribbed insulator design prevents electrical current from arcing over the insulator surface — a critical feature when running high-energy ignition systems common in race applications.
• Triple Seals Prevent Leakage: Three-layer sealing construction prevents combustion gas leakage past the plug shell, protecting engine internals and maintaining consistent cylinder pressure.
• 5k Ohm Resistor: Built-in resistor suppresses electromagnetic interference (RFI), helping to protect sensitive onboard electronics and data logging equipment found in modern race vehicles.
• Heat Range 9: The R7448A-9 runs a Heat Range 9, placing it in the colder end of the racing plug spectrum — well-suited for high-output, forced-induction, or high-compression applications that generate extreme combustion temperatures.
• Box of 4: Packaged as a set of four, making it straightforward to do a full plug change on most 4-cylinder applications or replace two cylinders on a larger engine in a single purchase.

Specifications

• NGK Part Number: 96969
• NGK Plug Code: R7448A-9
• Thread Diameter: 14mm
• Thread Pitch: 1.25mm
• Seat Type: Tapered
• Reach: 25mm (1")
• Hex Size: 5/8" (16mm)
• Terminal Type: Solid
• Gap: 0.030" (0.75mm)
• Center Electrode Material: Nickel
• Center Electrode Size: 2.5mm
• Center Electrode Projection: Projected
• Ground Electrode Material: Nickel
• Ground Electrode Shape: Trapezoid
• Resistor: Yes — 5k Ohm
• Heat Range: 9
• Torque Spec (Cast Iron Head): 10.8–18 lb-ft
• Torque Spec (Aluminum Head): 7.2–14.5 lb-ft
• Insulator: Pure alumina silicate ceramic
• Quantity: Box of 4

Fitment

The NGK R7448A-9 (96969) is a racing-specific spark plug without a published universal fitment list — it is not cross-referenced to specific production vehicle makes, models, or years through NGK's standard automotive fitment database. This is common for NGK Racing Series plugs, which are selected by engine builders and race teams based on thread size, reach, heat range, and application requirements rather than a vehicle lookup chart.

Buyers should verify compatibility using the plug's physical specifications: 14mm thread diameter, 1.25mm pitch, 25mm (1") reach, tapered seat, and 5/8" hex. If you are unsure whether this plug is correct for your engine build or race application, contact our fitment team before ordering — we're here to help.

What's in the Box

• 4 × NGK R7448A-9 Racing Spark Plugs (Heat Range 9, Solid Terminal)

Why Buy from ThreePiece.us

• Free Shipping: Every order ships free — no minimum required.
• Affirm Financing: Split your purchase into manageable payments with Affirm financing available at checkout, so you can build your race car on your schedule.
• Expert Fitment Support: Our team has over a decade of experience helping enthusiasts and racers spec the right parts. If you have questions about whether the R7448A-9 suits your engine, reach out before you buy — we'd rather help you get it right the first time.
• Real Stock: This product is regularly stocked, so you're not waiting on a back-order for a standard race-day consumable.

Frequently Asked Questions

Q: How many spark plugs come in this listing?
A: This listing includes a full box of four (4) NGK R7448A-9 spark plugs under part number 96969.

Q: What type of terminal does the R7448A-9 use?
A: The R7448A-9 uses a solid terminal configuration. Make sure your spark plug wires or coil connectors are compatible with a solid-post terminal before ordering.

Q: What gap does the R7448A-9 come set to from the factory?
A: According to NGK's published specifications, the ISO gap is 0.030" (0.75mm). Always verify the gap against your engine builder's specifications before installation, as high-performance and forced-induction applications sometimes require a different gap setting.

Q: What is the correct torque for installing the R7448A-9?
A: NGK specifies 10.8–18 lb-ft for cast iron cylinder heads and 7.2–14.5 lb-ft for aluminum cylinder heads. Always torque to the lower end of the range when installing into aluminum heads to avoid thread damage, and use a calibrated torque wrench rather than relying on feel.