Why would these be in my LS1?
I am switching to NGK TR55's and MSD 8.5mm Wires.
I replaced the drivers side today after work and I pulled out AC Delco 41-601's
I don't understand why these plugs were in the car the stock ones should be 41-931 I think.
Was there some benefit running the 41-601's?
I am glad though, I am replacing those Taylor Spiro Pro 8mm wires


