The Ultimate Ignition Upgrade for your VR38DETT Engine 
Maintain the legendary performance of your Nissan GT-R R35 with the NGK 93026 (DILKAR8A8) Laser Iridium Spark Plug. As the direct OE replacement for Nissan part 22401-JF01D, this plug is engineered specifically for the extreme cylinder pressures and high-heat environments of the GT-R’s 3.8L V6 Twin-Turbo engine. 
Whether you are driving a 480hp early-gen R35 or the 600hp track-ready NISMO, these Laser Iridium plugs provide the stable combustion and precise firing required to keep your Godzilla roaring. 

Key Performance Benefits:

• Laser-Welded Iridium Center Electrode: Provides superior durability and a high melting point, resisting wear under extreme boost.
• Platinum Ground Electrode: Ensures a consistent spark over a longer service life compared to standard plugs.
• Optimized Combustion: The 0.8mm factory-preset gap improves fuel efficiency and ensures smooth acceleration without misfires.
• Trivalent Metal Plating: Offers superior anti-corrosion and anti-seizing properties—no anti-seize required for installation.
• OEM Standard: The exact plug used by Nissan for factory assembly, ensuring 100% compatibility and reliability. 

Technical Specifications:

• Brand: NGK Laser Iridium
• Part Number: 93026 / DILKAR8A8
• OE Number: 22401-JF01D
• Thread Size/Pitch: M12 x 1.25 mm
• Thread Length: 26.5 mm (Long Reach)
• Hex Size: 14 mm
• Gap: 0.8 mm (Fixed SAE)
• Heat Range: 8 

Vehicle Fitment:

• Nissan GT-R (R35): 2007 – 2025 (All 3.8L V6 Models)
• Nissan GT-R NISMO: 2014 – 2025
• Engine Codes: VR38DETT (480hp, 530hp, 545hp, 565hp, 600hp variants) 

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Frequently Asked Questions (Q&A)
Q: Is the NGK DILKAR8A8 a direct replacement for the factory GT-R spark plug?
A: Yes. This is the genuine OEM replacement (Nissan Part #22401-JF01D). It is the exact specification required by Nissan for the VR38DETT engine. 

Q: Do I need to gap these plugs before installation?
A: No. These come pre-gapped at 0.8mm. It is highly recommended not to adjust the gap on Iridium plugs, as the fine-wire center electrode is fragile and can be easily damaged. 

Q: How many spark plugs does my GT-R R35 need?
A: The Nissan GT-R uses a V6 engine, so you will need a total of 6 spark plugs for a full replacement. 

Q: How often should I replace spark plugs in a GT-R?
A: While Iridium plugs are long-life, performance vehicles like the GT-R should have their plugs inspected every 15,000–30,000 miles, or sooner if the vehicle is frequently used for track days or is running increased boost levels. 

Q: Can I use these on a modified or tuned GT-R?
A: These are the standard "Heat Range 8" plugs. They are perfect for stock to mildly tuned GT-Rs. For "Stage 2" tunes and beyond (700hp+), some tuners may recommend a "one-step colder" plug, but for 90% of GT-R owners, the DILKAR8A8 is the gold standard. 

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Pro Tip: Always use a calibrated torque wrench for installation to prevent damage to the cylinder head. The 14mm hex "long reach" design requires specific clearance—ensure you have a dedicated 14mm spark plug socket.