The other day I took my car in to have my Magnaflow cat back put on my 99 3.8L V6. I hadjust bought some autolite double platinum spark plugs from napa and asked theshop if they would be able to throw them in while they were working on the exhaust. They told me Autolite spark plugs are really bad for Camaros and that it's not an easy job to put them in. Like a 2 hour job? Does anyone know why they would tell me Autolite brand spark plugs are bad for camaros? Thanks

 

In most cases you get best results by using the same plugs that the factory originally installed. For your car that would be AC-Delco 41-921.