Genuine NGK BKR8EIX Iridium IX spark plugs, supplied as a six-plug set for tuned Nissan Skyline RB25DET engines.
Vehicle fitment
- Nissan Skyline R33 GTS25t / GTST – RB25DET – 1993–1998
- Nissan Skyline R34 25GT Turbo / GT-T – RB25DET NEO – 1998–2001
Performance application: This is the NGK heat-range 8 version of the NISMO-supported plug family. It is a colder grade selected for appropriate modified, high-boost or competition engines and is not the factory service plug for every standard Skyline. Confirm the correct heat range and gap with your tuner or engine builder.
Product specifications
- Brand: NGK
- Part number / MPN: BKR8EIX
- NGK stock number: 2668
- Series: Iridium IX
- Quantity: 6 spark plugs
- Heat range: 8
- Thread diameter: 14 mm
- Thread reach: 19 mm
- Hex size: 16 mm (5/8 inch)
- Centre electrode: 0.6 mm iridium
- Resistor type: Yes
Reference numbers
NGK BKR8EIX / 2668; NISMO 22401-RN010-8; DENSO IK24 / 5311. References are identification guides; always verify the individual engine specification.
Before ordering
Check the engine code, fitted plug and written tuning recommendation. RB25DET and RB25DET NEO builds can require different heat ranges and gaps.
Delivery & returns
- Free UK delivery with an estimated 2–3 working-day service
- 30-day returns, subject to the item being returned in its original condition