OK, it's been awhile, since I've had to make glow plug decisions. What are the differences in OS, Fox, Towers, JZ and what ever else there maybe out there in glow plug land? Does price really make a difference in quality and life of the plug? Last glow plugs I bought (early 90's) where still Fox plugs with idle bar and now I find that idle bars aren't really needed anymore. I have an ASP .61 that came with a idle bar plug, but I have obtained several OS A3 plugs for backup. I just need a little help at this point so I don't go any crazier than I am already trying to make expensive purchases for glow plugs.

Thanks in advance,

Scott Slayman