Ive been told hks plugs were orginaly made buy denso and were irdium now there made buy ngk and are a mix of uridium and platinum .I think hks had some problems with the irdium ones do you think the new ones will be any better or do i just go for ngk thanks .:cool:

i have the new hks s-series plugs and they seem to be working fine. as far as i remember they are made by ngk

I heard a story by the owner of an R34 GTR who bought Denso, on recomendation of the Oilman he said, and they fell to bits and wrecked his engine.

 

Have no idea if its true. But it put me off them...Stick to NGK and be safe I think.

Just search the word "spark plugs" on this forum mate, plenty of good info to read and am sure you'll think differently afterwards. ;)

smithy