1990 Mustang GT 5.0 basic ignition tune up time up with MSD parts !

[@DanDolphin4]

I'm always confused when someone takes off all the wires at the same time.
Why wouldn't you just take one wire at a time and replace it?
It's so much easier then trying to keep track of what the hell's going on. Wow don't get it.

[@D.MacSays]

Did this improve your mpg at all?

[@josanti-ti8hv]

Sparkys did it improve mpg?

[@sparkman6713]

Never really paid attention to mileage was going for more sound.

[@D.MacSays]

I just installed one in my 91 lx vert

[@Dsfox88184]

Sparks plug’s difference I always run copper…