thats interesting but i guess the newer cars or maybe just being n/a is it. being s/c, the tr55's are two heat ranges colder and should be used when we force more air into the motor. on my t/a with a cam and intake i was running tr-6's, but i should've went to stock plugs or maybe even hotter when i went with larger injectors to make sure i was getting a good burn.Originally Posted by Gorecki
The TR55GP is a standard temperature platinum plug, essentially a stock alternative to delcos. I use NGK plugs and K&N Filters on all of my bikes so I simply went the same direction on my GP. Have to admit once I ditched the stocker stuff for what I have, I clearly have more power on demand and when I punch it over 3k on the tach and keep going I can tell it’s breathing much better and firing more smoothly. Really simple stuff made pretty noticeable differences.
