Hi evom got a quick question. i was looking to change my plugs before i get a tune and i am looking at NGK-R7437-8. they are one step colder then stock spark plugs. i am looking to tune on 91 octain and E85 dull map. anyway my question is, are they worth the price my tuner told me to get those but they are expensive wanted to get some info before i fork out 150 bucks for the plugs. Thanks in advance.

 

ngk bpr8es
change them about once a year.
^scratch that. i just noticed you have an evo 9 not an 8


denso iridium ikh24 48$ on stm's website

 

NGK ILFR7H are the stock plugs for a 9

unless you have a heavily modified car, stock plug temp are fine

 

Thanks guys I really appreciate it.

 

Stock plugs for an IX for sure!

 

"Demon" or anybody else that can answer this why is the different between Evo 8 and 9 plugs?

 

Are the denso plugs any good?

 

Don't know the explanation, but they are different plugs, and are not interchangeable. Neither are the coil-on-plugs.

Not from my experience with my friend's cars. OEM plugs are very very good, and last. All IX owners making under 500hp should stick with OEM in my opinion.

 

I believe the threaded section on the evo 9 plugs are longer

 

Mr Chu,coil on plugs are interchangeable.

 

So denso IKH24 are suppose to be alternatives for NGK R7437-8. What do u guys think? I mean at 50 bucks for 4 u can change them more often. I really appreciate the help guys and thanks in advance

 

Why not just run NGK ILFR7H?

 

That's what my runner told me to get. That's why I'm here asking more experienced/ seasoned Evo owners

 

NGK LFR7AIX
Since we're on the topic, what about those? Other parts of the internet say they'll work in a IX, but I'm skeptical of everything about my car unless you guys all agree.