When I went to NGk website to look and see what plugs will work, it pulls up 4 sets. Two for n14 and 2 for n16. I think it's a typo on their part (n16) but my question Is the two that are not for the n14 is one for jcw and one is just for the s? I have a 2011 mgs. And just wanted to double check before getting some.

 

I have the NGK ILZKBR7B-8DG in my JCW.

NGK ILZKBR7A-8G is the correct plug for the S, per our NAM vendors....would suggest that you purchase from one of them as they support this site.

 

but what has me confused is when I called NGK and talked to them they said they didn't have a plug for a 2011 mcs (n18). Just don't get why they say they don't have one that works.

 

N16 is the later model base version of the N18 --- N16 has no turbo. Comparable to the N12 base relationship to the N14 MCS / JCW. If they don't list a plug for the N18, it's probably because they don't make one. Maybe try searching their site with different parameters. There are a few different plugs available for the N14 that aren't in your list, just not OEM --- different heat ranges. What brand are you using now?