99T/ATIME

iTrader: (3)

... than an AC Delco 41-985 (OEM Plug for 07 Corvette). I called AC Delco direct after not being able to find anything on the internet and was told that the heat range tables were considered "Proprietary Information" and even they did not even have access to that for distribution

Anyway...Does anyone know of a plug that is 1-2 heat ranges colder than the 41-985???? Thanks

Darkman

iTrader: (2)

Any of the plugs listed for a 2006 LS7 will be one range colder.

Bosch 4505
NGK TR6IX
AC Delco 41104

99T/ATIME

iTrader: (3)

Thanks man...Where did you get that info???

HNK

What i use on my LS7 440 is the NGK BR7EF, what is referred to as the TR7. Gapped at .28. This would be a 2 step colder plug.
Now, we need to see videos of your car in action.

99T/ATIME

iTrader: (3)

Thanks... How much compression are you running?