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I just put a set in my 2003 GS430, I think it made a small difference right at the shift points (a little more torque right after the shift), but not sure. However, I noticed that there is aan ever so slight miss at idle, particularly when the car is cold. Hard to detect, but it is there. I am thinking about going to a hotter plug. Does anyone have any input on this?
The idle problems I had with the Torquemaster plugs on my GS430 has reduced after several months of use but still noticible at times depending on weather conditions. I was told by the Lexus technician that a hotter plug should fix the problem but I do not think TorqueMaster make a hotter plug.
Toyota and Lexus Join Mille Miglia For The First Time
Slideshow: A five-car lineup spanning more than five decades of Toyota performance and engineering will tackle one of Italy's most celebrated automotive routes.