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TR6 equivalent?Deadcarny 02-01-2003, 12:22 AM i need to change my plugs. i have about 6 bottles on a set of TR6's, but i have a set of 104's here at the house. i kinda want to change them tomorrow, but to get TR6's i have to order them. i really don't know what heat range a 104 is compared to the NGK TR6. is it okay for my 150 shot? or should i wait on the TR6? thanks in advance. drop top steve 02-01-2003, 12:55 AM The 104's are two steps colder than stock. Deadcarny 02-01-2003, 09:20 AM thanks steve. so they are the smae as the tr6. i will put them in this morning. JSK333 02-01-2003, 01:15 PM I have always heard and am pretty sure that 104s are only one step colder than stock. I think the Autolite 103s are two steps colder than stock. I use 104s for a 100-shot (and occasional 150-shot). Deadcarny 02-02-2003, 03:06 PM no worry, my friend had 3 sets of tr6's, so he gave me a set. i will wait till somebody in my club needs the 104's for a 100 shot or so and will give them away. | ||