I searched but still didn't find out the correct part numbers for the NGK Iridiums for the MCS. The NGK website says the correct part number is ZFR6FIX-11 but other sites say the part number starts with BKR6. I want 2 ranges colder so i know the number would be 8. Thanks in advance...

 

Take BKR7EIX, thats the right one... don't know if there is a 8 from NGK, but I would not recommend it !

 

It is the BKR8EIX, and some people run them. I just installed the 7s. Too soon to tell if anything is different as it was not hot this morning.

 

Several people have been running plugs 2 heat ranges colder than stock, others have talked about even going another ranger colder. Some run Denso, others NGK. I run Denso's now but get better prices on NGK's, so that's what I'm going with.

DrPhilGandini, I ran Denso IK22 on my car for over a year with no problems and a lot of times have felt that even colder plugs would be better.

To both of you, thanks for confirming the proper part numbers! Appreciate it.

 

I am running the NGK one step colder plugs and they have outperformed the Denso's

 

I run the BKR8EIX's, no issues. I live in SoCaL where the summers often top 115F, Running stock plugs here would be detonation heaven .

 

Glad to hear it, thanks for the quick review.

What's the cheapest place to get these plugs from? So far eBay is cheapest at $35 Shipped for the set...

 

So being in SoCal and having a stock '06 JCW, is it recommended to go to a colder plug?

 

The JCW comes with NGK's that are one range colder than that on the stock MCS. But theyre not Iridiums, I personally would at least run the equivalent Iridiums or the BKR8EIX (2 ranges colder)..

So is eBay the cheapest? Or is there somewhere cheaper?

 

Thats a very good price. Just make sure you don't pay a biunch for shipping.

You can also check out NGK.com. They have about the best price.

 

Yeah its $27 for the set of plugs and $8 shipping on eBay. Beats the ngk.com price by about 4 bucks...

 

I got mine at Autozone,wasn't a stock item,but had them the next day for $6.99 ea (irdiums)
Bill

 

 

Hmm I'll pass by Autozone today and see whats up.

 

Getting my car back in a little bit then heading to Autozone, hopefully they have the plugs in stock. Anyone know the proper torque settings for the spark plugs?

 

Just hand tighten them, I don't remember the exact spec, I think it's around 20, but I recall someone saying that you should torque them up to 24-25 if you're going to be putting any serious load on the engine.