Jan 31, 2022 #1 J jrwitheart Newbie Joined Jan 31, 2022 Messages 1 Reaction score 0 Location Blue Ridge Ga. 30513 What would best gap be if instaled NGK-TR5GP Platinum spark plugs. 98' Silverado 4x4 350 Vortex Attachments 20210507_200510~2.jpg 379.2 KB · Views: 2
Jan 31, 2022 #2 N Nad_Yvalhosert I'm Awesome Joined Oct 11, 2016 Messages 1,692 Reaction score 2,120 Location Rochester, NY What does it say on the emission sticker under the hood?
Jan 31, 2022 #3 N Nad_Yvalhosert I'm Awesome Joined Oct 11, 2016 Messages 1,692 Reaction score 2,120 Location Rochester, NY Doesn't the box that the platinum plugs come in say something like "Do not regap"?