In the description it says the plugs are colder for tuned engines. Is that for N54 engines with aftermarket Bolt on's ie: intercooler, Charge Pipe, DCI's. Thank you.

The plugs can be used for OE or minor bolt on applications (such as a the mods above) or tuned applications where power levels have been elevated over stock substantially. Regardless these spark plugs need to be regapped for the N54 engine regardless of power output and the recommended gap specs are listed in the description.