what are the best spark plugs

[matt3989]

well i am going to change the plugs and wires soon, i was going to use msd 8.5 wires but im not sure what plugs to go with

i have a 99 3.8 camaro

[98Camaro3.8]

TR55s are the common one, but there really is no such thing as "the best". Cheap plugs from the parts store would do fine.

[Fredless]

AC Delco. I use AC Delco Professionals (NGK TR55ix) in disguise.

[96RS Alex]

I recently installed Bosch +4's.
To me it was definitely a noticeable difference and I'm averaging better mileage too.
Seafoam your car NOW before you swap plugs because it will decarbonize your combustion chambers as they will gunk up your old plugs.
At that point you can install a fresh set of spark plugs knowing you have cleaned the combustion area.
I added 1 can of Seafoam in my crankcase before the oil change tomorrow & 1 can in my ( full )gas tank for the injectors.
The can of Seafoam clearly points out the advantages of a cleaner engine internally.