Well... most of you know about the evo 9 the spark plug has the NKG ILFR7H my question is.. what can i use that is not iridium and one step colder (8) ?

Regards
Daniel

 

I was looking all day yesterday for that specific info as I have all the specs on the plug... I am gonna research it some more today to see if I can find a copper core replacement for you guys... But the depth of the plug is what I am having a hard time with as most of the plugs with that depth are either iridium or platinum plugs...

 

HKS Part number: S40iL
OE NGK number: ILFR7H

Stock Plug= NGK ILFR7H Stock #5245 LINK
Step colder= NGK R7437-8 Stock #4901 LINK
2 Steps colder= NGK R7437-9 Stock #4654 LINK
3 Steps colder= NGK R7437-10 Stock #4655 LINK

NGK ILFR7H (OEM) Iridium
http://www.sparkplugs.com/more_info.asp?AAIA=&pid=20451

NGK LFR7AIX Iridium
http://www.sparkplugs.com/more_info.asp?AAIA=&pid=16602

 

http://www.sparkplugs.com/results_cr...kh24&x=61&y=15

those are iridium plugs but they are only 11.99 and they are 1 step colder.

I could never find the copper plugs for the 9. some people say you dont even need 1 step colder for the 9 as they all ready run a cold plug. but the denso plugs are working great for me.

IKH24 is the part number

Joe

 

Just spoke with NGK tech, and Denso tech and they do not make a conventional copper plug in the stock or 1 step colder heat range yet... I am going to call Champion and Autolite and see what they say... Denso had a spec match but it was a 20 heat range (22 is stock). Champion had a spec match but a different heat range also... Autolite is a no go too...

 

I will look into this R7437-8

thanks

 

And the Denso IKH27 is 2 steps colder... it's the same price @ sparkplugs.com as the IKH24 - $11.99 each.