Hey Old Dog, my 2010 VE SS 6LTR Auto AFM, on a muscle car ? I changed the plugs as holden charge the earth, 4 plugs burnt out the other 4 where in good nick, but ya gotta change all of them. would it be damaging heads, rings ect? cost of plugs V's economy not much difference ! I have a new varex 2 and 3/4" exhaust system on so I can hear it. what would it cost to remove the AFM system.