Spark plug Champion or AC DELCO

the Champions are really surpassing my expectations!

I bought Champion Copper's....they're like $3 a pair, and she pulls like a SOB. I just replaced the Champ with the exact same....save ur hard earned $$ and spent it on wax or lights or some other accessory to make her stand out

car has been running with champion plugs so thats what i put in and it reved to 6500 just fine......the car likes the new stuff i put in a lot.

Put them into a stock '87 Subarban and tore my hair out thinking I messed up the wires 'cause it idled so bad. Really, like I had two wires switched. Put the old worn regular AC's that I just took out and it idled perfect.