I have a 92 LS (stock) and have got ZFR6F-11 (4291) plugs in it, the only problem is on the box its got “projected gap type” on the box. i am almost certain these are the wrong plugs because of the “projected gap type”, but ive been running these for arounf 10,000km already and no problems that i know of.
Has anyone used or even heard of these plugs b4, i did a search on google and came up with like 2 results so im quite lost right now.
Heres the link to the ngk page with a short descritption of it, it worries me when it says note: use only in specified engines… http://www.ngkspark.com.au/content.php?page=faqs.html&Image=8&layer=layer4&hl1=l49&hl2=l40
Look under Q13 special plugs for the short description on the projected gap type" plugs
Im from australia so i dunno if american tegs are different, the recommended plugs for me are ZFR5F-11 or for long continous high speed or load blah blah use ZFR6F-11. i am using the right plugs but… im using some special version of it, on the box it says “pojected gap type” and i ve realised the tip is longer than usual. im just wondering if any1 has aleast heard of or used them b4 because i ve done like 10,000km on them with no side effects, im not a racer or nothing so i don’t rev high.