Genuine NGK BKR8EIX Iridium IX spark plugs, supplied as a set of six for tuned Nissan RB25DET and RB25DET NEO engines.
Verified performance applications
- Nissan Skyline R33 GTS25t / GTST – RB25DET – 1993–1998
- Nissan Skyline R34 25GT Turbo / GT-T – RB25DET NEO – 1998–2001
- Nissan Stagea WC34 2.5 Turbo – RB25DET / RB25DET NEO
- Nissan Laurel C34 / C35 2.5 Turbo – RB25DET / RB25DET NEO
- Nissan Cedric / Gloria Y33 and Y34 models using RB25DET
Performance application: BKR8EIX is the heat-range 8 version of the NISMO-supported ISO plug family. It is intended for engines whose tune, boost and operating conditions require this colder grade; it is not a universal standard replacement for every RB25DET. Confirm the plug grade and electrode 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. Cross-references are for identification only—confirm the required specification for the individual engine.
Before ordering
Match BKR8EIX to the part currently fitted or to written tuning guidance. Modified engines may require a different heat range or plug gap.
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