I hope my local Mitsu shop has them in stock, as I spoke with my tuner, and we're beginning some street tuning this week. . I will update with how they work out. I drive from PA to Indiana a few times a year, and would really like to optimize fuel economy as well as drivability, and I think these plugs could help with that.

I am genuinely worried about the longevity of the T-Case. I don't beat on/launch/powershift the car, and it had a stock rebuild last year. Do you think the drivetrain will hold up for a little while?

 

We recommend leaving the gap tight independent of the ignition being used. The COP is there to prevent high boost misfire. There is no power to be gained at high gap nor mileage, I have tested that thoroughly.

0.020" is still the best for our cars.

Aaron

 

Good to know. Thank you Aaron. I will still try out the other plug mentioned.

 

Is that for both copper electrode and iridium electrode tips?

 

I wonder the same thing. I am also concerned about as to whether or not this is dependent on the fuel used.

 

And I'm also wondering whether its the same for Evo 8 and Evo 9 heads/sparkplugs.