sparkplug gap for tr55
#2
The tr-55 comes pre-gapped. If you're pretty much stock or have a few bolts on, just leave em. If you have a turbo or blower, I'd run the tr-6 with a .35 gap. That's what I used to have on my truck when I had the radix. When I sprayed it, I ran tr-7 plugs gapped around .27-.29 on 9#'s
#4
I run mine at .055, and the general consensus is anywhere between .050 to .060. Be sure to at least check the gaps before you install them, last time I bought a set of TR55's 7 of them were around .055 or whatever, and one must have been dropped as it was at .040ish...
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