I'm been using NGK Iridium 7's for over a year now....and no problems with fouling or anything @ 15 psi on a t25g. I may get some iridium 6's next as the 7's are probably an overkill for my hp level. I think I paid under 7 each from
http://www.sparkplugs.com which is a bonus, because I'm still use to paying for 8 plugs on my old "2 plugs per cyl" ca18et.
Also, someone mentioned to use plugs for a ca18de pulsar? Don't know if there is a difference, but I'm pretty sure I'm using spark plug part numbers for a s12 ca18et....as mentioned in the "part number/ cross over" section. I'll have to pull a plug and verify
Modified by RS12Turbo at 7:26 PM 3/29/2008