I am having trouble selecting the correct Spark Plug for my 2008 MCS. As stated in my signature, the only performance mods are exhaust and a K&N drop in Filter. I tried doing a search but was unable to narrow it down. I am hoping some of the tuners could shed some light on a good plug.

Thanks AXO

 

Might want to check out this thread and then follow some of the links in the responses.

fwiw, as much as I liked the Brisk plugs I installed, I continued to have problems with them and have now gone back to the stock NGK plugs.

 

I would stick with the stock NGKs as well. There are not a lot of choices in the replacement market.

 

Slinger, is there a cooper NGK to run for those who don't want the OEM iridium or platinum?
And is there cooper plugs that are one-step colder for increased boost + combustion temps?

- Erik

 

Not that I am aware of. Take a look at this website. They have most cross references and choices:

Www.sparkplugs.com

They show only the OEM iridium.

Why do you not want iridium? Just curious?

 

Thanks for the links. I have decided to go with the stock NGKs. Now to check the vendors for who has the best price. At my dealer it is $90.00 for 4.

 

I got my set from rockauto.com about 3-4 months ago and it costs $49 approx shipped.

 

Copper has the higher electrical continunity value...
And they are typically cheaper in cost to produce...
And finding a step-colder plugs is needed when I run higher boost / combustion temps...
Plus, I'm willing to change them out much more often than the norm without a fuss.

- Erik

 

Brisk makes plugs czar runs some.

 

I got a set of the NGK factory plugs (NGK (5992) ILZKBR7A-8G Laser Iridium) from Amazon.com of all places for $11.63 ea with free shipping....amazing what you can find from Amazon.com!

 

Do you have to change the coils when changing the plugs?

 

No, those are only replaced if they fail.

- Erik

 

If you need a plug that will work in a little bit hotter running engine you can dress the stock NGK plugs. Just knock off the sharp corners on the side elctrode and the base of the plug. DO NOT hit the fine wire in the middle at all or the pad on the side electrode or you will damage the iridium and the plug will fail very quickly. I'd use a diamond file. The main place to focus is on the edge of the side electrode, it should be the hottest part of the plug, just be very careful. This isn't a bad thing to do regardless of the mods (even no mods), it shouldn't affect how long the plugs last or how well they stay clean, just gets rid of some hot spots in the combustion chamber.