I searched sparkplug.com, clubrsx.com & the NGK website. All of them stated that the proper plug for my 06 LX 4cyl AT California car was Laser Iridium. part # IZFR6K11. plug gap .044. So I purchased them. (Just an FYI Clubrsx.com was about $10 cheaper delivered than sparkplugs.com)
They arrived yesterday and when I pulled the original plugs they were #IZFR6K-13. My question is should I send these back and get the "13's" or are the "11's" ok?



Thanks
Mark

 

The -11 or -13 at the end of the number is the gap set at the factory. So those are the same plugs with a different gap.

The -11 is 1.1mm = 0.0433". I'm not saying I know which gap is correct for 2006, but you can check that in your owner's manual.

 

OK. I always check the gap before I install plugs. I feel better knowing that the number is not a heat range etc.
Thanks
Mark

 

The 6 in the middleis the heat range. Check this out...
http://www.ngk.com/sparkplug411_ngk.asp

ps... Be careful when you check the gap. It's easy to break off the little bit of precious metal from the electrodes.

 

Great info. Thanks!!!