Z27AG Spark Plugs ILZFR6C-K / IKH22 / IZFR6C-K

More Info: /research-into-colder-plugs-z27ag.html

SPARK PLUG SPECIFICATIONS [from the forums]

Ralliart Colt 4G15 NGK Plug Part No IZFR6C-K Or from NGK Web Site its ILZFR6C-K (there is an "L")

Spark Plug Gap 0.7mm − 0.8mm Limit 0.95 mm

Part number Decode as follows

I = Iridium

L = Long Thread

Z = Protruding Type

F = 14mm diameter x19mm thread dimention and 16mm heax head

R= Resistive

6 = heat rating (9= cold 4=hot)

C = Suffex code ??

-K = should be the plug gap but doesnt line up lol

Hex Size 16mm
Terminal Type Solid
Thread Diameter 14mm
Thread Reach 26.5mm

Laser Iridium

Iridium tip

Platinum pad/chip

100,000 kms

VKH20Y
Equivalences :
- NGK LFR6A / ILFR6A / LFR6B / ILFR6B / ILFR6C / ILFR6G / ILZFR6C-K / LFR6AIX / LFR6AIX-P / LPG7 / NGK LASER LINE LPG 7
- DENSO K20HR-U / IKH20
- BOSCH F6MPP332 / FR7NI33
- SUBARU 22401AA630

Alternative Info:

DENSO Iridium Power P# IKH22, I also found an IKH20 (used on the non turbo models)

I believe this is the reason:

Z27AG 4G15(MIVEC·T/C) - Denso VKH20Y - Iridium Power: IKH22(Use VKH20Y for normal engines and IKH22,VKH22 or colder for tuned engines)

Hence Iridium Tough is VKH20Y and Iridium Racing IKH01-

DENSO Iridium Tough P# VKH20

MITSUBISHI P# 1822A005 (ILZFR6C-K)

More info on Iridium Racing:

Iridium Racing IKH01-□ technology invincible super-tuned up for the race at the circuit demonstrate the strength, the performance of the plug is 0.4mm. Pull the full potential of the machine, which contributed to the victory Iridium Racing. Iridium Racing Race ※ suited to tune up, based on the Iridium Power plugs and standard heat value, please select the plug-tuned according to the level of thermal value. The part - and the heat value of the item numbers below two digits. (Range 24-35 mainly)

Fits automakers: Mitsubishi

car name: COLT displacement: 1500cc Vehicle

type: Z27AG

Model Engine: 4G15 (MIVEC · T / C)

Year: January 2006-

type plug : VKH20Y No.: IKH01-24 ~ 3

There are also Blitz and HKS plugs available.

HKS M35iL via http://minkara.carview.co.jp/

My 5cents:

i have replaced mine at 60,000km...they are ILZFR6C-K, that is what i pulled out of the block...and replaced them with...think they were just under 100$ from auto one...went to 5 shops no one stocks em...

http://www.ngksparkplugs.com/tech_support/spark_plugs/faqs/faqread.asp

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Threaddiameter: 14mm
Threadreach: 26.5mm
Hexsize: 16mm

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http://www.sparkplug-crossreference.com/convert/DENSO_PN/IKH20

Replacement spark plugs for DENSO IKH20:
Autolite XP5325
Beru 14FR-8NQU213
Bosch F6MPP332
Bosch FR7SI30
Bosch FR7ME
Bosch FR7NPP33
Bosch FR7SE
Bosch FGR7MQPE
Bosch FR6MPP332
Bosch FR7MPP10
Bosch FR7NI33
Bosch FR7NPP332
Bosch FR7SE0
Champion REC9MCLX
Champion REC9YCL
Champion OE178
Eyquem RFN58HZ
NGK LFR6BP-11
NGK ILFR6J11K
NGK LFR6AQP
NGK LFR6C11
NGK ILZFR6B
NGK ILFR6A
NGK PLFR6A11
NGK ILZFR6C-K
NGK LFR6AIX-11
NGK ILFR6C
NGK SILFR6A11
NGK LFR6AIX11
NGK LFR6A11
NGK LFR6AP-9
NGK ILFR6G
NGK LFR6AP9
NGK LFR6AIXP
NGK LZFR6AI
NGK ILZFR6A11
NGK LFR6BP11
NGK LFR6D
NGK ILZFR6C11K
NGK ILFR6B
NGK PLFR6A9
NGK ILZFR6D11
NGK LFR6AP-11
NGK ILFR6C11
NGK LFR6AP11
NGK LFR6AIX11P
Nismo 22401-RN020-6
Torch KH6RTC
Torch KH6RTP-11
Torch KH6RTQP
Torch KH6RTIP-11
Torch KH6RTP-9

http://www.ngksparkplugs.com/docs/tech/design_symbols_plugs.pdf