how much would you spend on spark plugs. im looking to spent aroud 4.50 for the autolite double plat plugs. or should i get some copper plugs. dont have any mods to worry about but im gonna put a custom intake on pretty soon on my gt.
plat or copper for performance?
also i just put plugs in my car about6 months ago becuase there was a stumble in the motor and i didnt know if it was the plugs or something else so i just bought cheap plugs (2.50 ngk). but know i feel the stumble once in a great while and when i stomp on the gas i can here it miss fire. could this be the cheap plugs or should i chage the wires that i didnt change with the plugs.
srry for the long question
