Spark plugs for nitrous

[1320n2oSHO]

Does anyone have a part number and or suggestions on heat range. It's going to be a 75/100 shot dry zex kit. I ran this in my 89 SHO but I can't remember if I went one or two heat ranges colder:woo-hoo:

 

[yamahaSHO]

http://www.shoforum.com/showthread.php?t=33480&highlight=nitrious+spark+plugs

http://www.shoforum.com/showthread.php?t=106201

http://www.shoforum.com/showthread.php?t=111998

http://www.shoforum.com/showthread.php?t=125102

 

[1320n2oSHO]

Thanks lots of good info. I probably should have searched first haha.
I ran a 100 shot with no timing just the 155lph fuel pump and colder plugs and it ran pretty damn good never got to hit the track on the bigger shot but ran a best of 14.01 on the 75 shot