Thanks for that 430..... I think as people with pulleys are not having trouble firing the IK20s with a gap of 0.44, and the OE gap is 0.40, I will get the IK22 for the cooler heat range, and regap them to be 0.40

This is a good read on sparkplugs ect

http://www.ngksparkplugs.ca/tech_spoverview.cfm

I would just use the IK-22's at the stock gap, they run fine. Messing with the gap on these iridium plugs is asking for trouble. One slip of the pliers or whatever you are using and you can break the delicate electrode.

FRANK W,

What is the source that you came across that said the IK16 Denso plugs are actually colder than the stock NGK IFR6D10 plugs? I'm curious because after putting in the IK16's and reading through this post I'm a little less confident in the 16's. Help put my mind to ease.....

i gotta do this my magnecor wires stay getting loose like they want to fall off

please reference this link, it shows that the IFR6D10 plug = IK20

IK16 is hotter, IK22 is colder...

http://www.sparkplugs.com/results_cr...CrossWarning=1

there is a vendor on eBay selling 12 pack of ik20's for $114.90 shipped. thats$9.58 shipped each. I have not been able to find them cheaper.

i think i paid more than that for mine...sounds like a good price

IK 20s gap .040

This is one level colder and .004 gap reduction.

If you order the SL65 plugs its IK20 gap 0.040.

The engineers at Nippon Denso insist their IK20 is the equivalent heat range to our (C32) OE NGK IFR6D10. Their fitment guide http://www.densoiridium.com of course concurs. Don’t know if I gained any horsepower, but the placebo effect undoubtedly makes for a smoother running V6.

Congratulations on that 11.8 at 118. Takes some serious grunt to achieve those numbers.

I found a GREAT PRICE on the Magnacore wires $130 shipped ( gotta love the free ground shipping )


you can find them here :
http://www.directtuning.com/store/pc...ire-04-05.aspx

i just posted a thread for free magnecor wires if you guys are interested...

Sorry to bring this back up..but i need some help with decisions.

So....
here the thing im readind and thinking.

my car has now 41880 miles..dont think service B includes plugs and wires...

so i think i will need to get new plugs and wires...

from what im reading i should get IK-20's but not the magnecor wires....seem like there are a lot of issues.....

can someone help clarify this?

i will be also putting on the evosport pulley..

thanks in advance...

get the LETMotorsports Wires...

to answer your question, i would go with the IK22's they are one heat range colder than stock and will be better for you car in the long run...i am running the NGK version of this plug and i have had zero issues in 20,000miles!

i have these instock if you want to order them and i can supply the plug wires as well...

please let me know if you have any questions and i will be glad to answer them!

thanks!

Whats the difference between your wires and OEM??

also i will pm u with some more questions...hehe

So, it is better to take IK20 or IK22 instead IK16 for the stock car (C320) or Just iridium IX?

is the IK16 the stock heat range for the C320?

The IK20 is the stock heat range for the C32 AMG. Some people go colder when they add more boost and switch to IK22 plugs (a step colder than stock C32 plugs).

For your car, IK22s are not the right plug. Check the W203 forum for the stock heat range. You dont have to use the Denso Iridiums though. You could use the NGKs.

and if you get new spark plugs, make sure you use the correct gap.

If I'm not wrong then, It means I should just use NGK Iridium IX for my c320 instead of buying IK16 for my car, since my car is stock...

NGK Iridium IX is a type of NGK plug. There are different heat ranges for it. The NGK Iridium IX bkr6eix-11 is comparable to the Denso Iridium IK20 and the NGK Iridium IX bkr7eix-11 is comparable to the Denso Iridium IK22. I dont know what the number is for the comparable IK16 plug, but if they make it, judging on how those numbers just progressed after the "bkr," my guess is that it would be bkr5eix-11, but is just a guess. Check the NGK website and verify on the W203 forum with other C320ers. Also make sure that when you order the plug and install it, it is at the correct gap.

Recently replaced my ~102,000-mile '02 plug wires with (8) 112 150 01 18 & (4) 112 150 02 18 OE Bosch hardware.
Concurrently installed inexpensive NGK BKR7EIX-11s (gaped to .035”) in place of its former Denso IK22s.

Can’t be certain which ultimately contributed, although it’s running smoother and stronger than it has in a long while. ~$300 well spent.

Planning the exact same replacement once the weather warms up here. Sticking to the stock wires too.

ok, i herd 2001-2005 c320's have 2 plugs per cylinder??? how can that be?+

You herd right. More spark more boom more go.

wonder how it get more power on the hi-way. in town it feels like a normal car. but past 45mph it starts building horse-power

The dual plugs are for a more complete burn to clean up emissions.