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IRIDIUM POWER Lineup – DENSO SPARK PLUG

Product lineup of iridium power and introduction of feature.
* The design of the insulator mark varies according to the thermal value.

IKH series

IKH16. IKH20. IKH22. IKH24. IKH27

  • φ14 mm ×L26.5 mm length long reach type.
  • For SUBARU 3 Liter, NISSAN, PEUGEOT, CITROEN, and YAMAHA MARINE.
  • イリジウムタフ VKH16, VKH20, and VKH22 are also on sale.
IK series

IK16. IK20. IK22. IK24. IK27. IK31. IK34

  • Mainly used for cars. ISO type.
  • φ14 mm ×L19 mm length type.
  • IK22 and above are for tuned engines, with a spark gap of 0.8 mm.
  • IK16G, IK20G, and IK22G have a solid, stainless steel gasket (mainly used with HONDA engines).
  • イリジウムタフ VK16, VK20, and VK22 are also on sale at the same time.
  • IK□L is extended type (spark position 5mm)
IK-L series

IK16L. IK20L

  • φ14 mm X L19 mm X Hex 16mm.
  • Extended Type The spark position is longer than IK20 by 2mm.
  • KJ16CR-L11 / KJ16CR are substituted by IK16L KJ20CR-L11 / KJ20CR11 are substituted by IK20L(see this catalog for more substitution)
IK-G series

IK16G. IK20G. IK22G

  • Mainly used for cars. ISO type.
  • φ14 mm X L19 mm length type.
  • IK22 and above are for tuned engines with a spark gap of 0.8 mm.
  • K16G, IK20G, and IK22G have a solid, stainless steel gasket (mainly used with HONDA engines).
  • イリジウムタフ VK16G, VK20G, VK22G are also on sale at the same time.
IQ series

IQ16. IQ20. IQ22. IQ24. IQ27. IQ31. IQ34

  • Mainly used for cars.
  • φ14 mm ×L19 mm length type.
  • IQ22 and above are for tuned engines, with a spark gap of 0.8 mm.
  • イリジウムタフ VQ16, VQ20, and VQ22 are also on sale.
IW series

IW16. IW20. IW22. IW24. IW27. IW29. IW31. IW34

  • φ14 mm ×L19 mm length fully threaded type.
  • IW16 to 22 are focused on ignitability with a 1.5 mm projection, whereas IW24 to 34 are focused on heat resistance with a projection of -1.5 mm.
  • The spark position of IW24 to 34 is projected 0.5mm compared to normal (1.0 → 1.5 mm).
  • Equipped with 0.4 mm diameter iridium center electrode for improved ignitability.
  • イリジウムタフ VW16, VW20, and VW22 are also on sale.
IWM series

IWM24. IWM27. IWM31

  • This type has a gasket face height shortened by approximately 10 mm from the IW Type.
  • The イリジウムタフ version of the IWM01-□ Iridium Racing plugs.
  • Sold as street-use plugs for 2-cycle 250cc sports bikes.
  • For HONDA NSR250, YAMAHA TZ250R, SUZUKI RGV250Γ (Gamma), Aprilia RS250, KTM260, 300, and 380 (’99 and later).
  • Can also be used for water cooled kart engines.
IWF series

IWF16. IWF20. IWF22. IWF24. IWF27

  • φ14 mm ×L12.7 mm length short reach type.
  • WF27 utilizes the heat resistance of the iridium electrode to extend the spark position 0.5 mm (1.0 → 1.5 mm)
  • Harnessing the low required voltage of the 0.4mm dia. iridium, the gap is wider than in standard types (0.7 → 0.8 mm). Ignitability is increased even further.
ITV series

ITV16. ITV20. ITV22. ITV24.ITV27

  • φ14 mm ×L25.0 mm length tapered seat, long reach type.
  • For the FORD Focus, Mondeo, Escape, CHEVROLET Blazer and MAZDA Tribute.
ITL series

ITL16. ITL20

  • φ14 mm ×L25.0 mm length tapered seat, long reach type.
  • Designed so that the head of the plug is 6 mm higher than in the ITV.
  • Use with CHRYSLER’s PT Cruiser, Voyager, Dodge, Magnum for 2005 model years and later.
IT series

IT16. IT20. IT22. IT24. IT27

  • φ14 mm ×L17.5 mm length tapered seat type.
  • For use with GM, FORD, CITROEN, JAGUAR, PEUGEOT, VOLVO, MERCEDES-BENZ, LANCIA, RENAULT, AUDI, and MAZDA.
  • イリジウムタフ VT16, VT20 are also on sale.
ITF series

ITF16. ITF20. ITF22. ITF24. ITF27

  • φ14 mm ×L11.2 mm length tapered seat type.
  • For use with GM and FORD.
IXUH series

IXUH22. IXUH20I. IXUH22I

  • φ12 mm ×L26.5 mm lenghth fully threaded type.
  • The insulator is fully projected(1.5mm), creating greater heat range and greater ignitability.
  • 16mm Hex
  • Application: BMW, MERCEDES BENZ, HONDA, MITSUBISHI, MAZDA, SUBARU, SUZUKI, DAIHATSU.
  • イリジウムタフ VXUH22, VXUH20I, VXUH22I are also on sale.
IXU series

IXU22. IXU24. IXU27. IXU22I

  • φ12 mm ×L19 mm length fully threaded type.
  • The insulator is fully projected (1.5 mm), creating a wide heat range and greater ignitability.
  • 16 mm Hex
  • For use with small cars and imported motorcycles such as DUCATI.
  • イリジウムタフ VXU20, VXU22, VXU24, VXU22I are also on sale.
IX series

IX22. IX24. IX27

  • φ12 mm ×L19 mm length fully threaded type.
  • Using the high heat resistance of the iridium electrode, the spark position is projected 0.4 mm more than in standard types. (1.6 → 2.0 mm)
  • Harnessing the low required voltage of the 0.4mm dia. iridium the gap is wider than in the standard types (0.7 → 0.8 mm). A further increase in ignitability.
  • 18 mm Hex
IX-B series

IX22B. IX24B. IX27B

  • φ12 mm ×L19 mm length fully threaded type.
  • Compared to the IX type, the insulator projection is extended 0.9 mm (0.6 → 1.5 mm), resulting in a wider heat range.
  • The spark position is projected 0.8 mm more than the IX type. (2.0 → 2.8 mm)
  • 18 mm Hex
IXG series

IXG24. IXG27

  • The Iridium Power versions of the 2 mm shroud type plugs (X24/27GPU) used by HONDA.
  • Applicable to CB400SS. An expansion of applications is planned.
  • Applicable to HONDA CB400SS, XR400RR, CL400/RS, XLR250R, CBX250S, FTR250, CBX400F, XR250R.
IU series

IU20. IU22. IU24. IU27. IU31. IU22D. IU24D. IU27D

  • φ10 mm ×L19 mm length fully threaded type.
  • Harnessing the low required voltage of the 0.4 mm iridium center electrode, the spark gap is wider than in normal type. A further increase in ignitability. (0.8 → 0.9mm)
  • For motorcycles such as YAMAHA and KAWASAKI, also for FERARRI, MASERATI, and ALFA ROMEO.
IU-A series

IU24A. IU27A. IU31A

  • φ10 mm ×L19 mm length fully threaded slant ground electrode type.
  • Harnessing the low required voltage of the 0.4 mm dia. iridium, the gap is wider than in normal type (0.7 → 0.9 mm). Ignitability is greatly increased.
  • By making this a single electrode, the spark location is stabilized compared to in normal types (double ground electrode), securing an ideal combustion condition.
IUH series

IUH24. IUH27

  • φ10 mm ×L19 mm length half-threaded type.
  • Using the high heat resistance of the iridium electrode, the spark position is extended 0.4 mm compared to standard types (1.6 → 2.0 mm)
  • Use only with HONDA
IUF series

IUF22. IUF24. IUF14-UB

  • φ10 mm ×L12.7 mm length short reach type.
  • Using the high heat resistance of the iridium, the spark position is extended 0.4 mm compared to standard types (1.6 → 2.0 mm)
  • Harnessing the low required voltage of the 0.4 mm dia. iridium, the spark gap is wider than in normal types (0.7 → 0.8 mm). Ignitability is greatly increased.
IUF-A series

IUF27A. IUF31A

  • φ10 mm ×L12.7 mm length short type.
  • Ideal for Gorilla/ Monkey Racing.
  • The ground electrode has a slant shape, reducing the thermal stress on it.
IY series

IY24. IY27. IY31

  • φ8 mm ×L19 mm length tapered seat, half thread type.
  • The world’s first 8 mm thread diameter iridium plug.
  • Can be used with HONDA Smart Dio (’04-), VFR400, RVF400, Kitaco Monkey Head, and NR750.

Actual products may differ from images shown.