what is the difference between the 6b and the 6g plug i changed my plugs when the coils cracked the other day and now it doesn't seem to boost as much as it used to on the 6g plug but subrau dealer says that the 6b is the corret plug for the car do the plugs need to be regapped or do i need to put the 6g plugs back in any help would be very aprrecited as i'm have untold probs with the scooby at the mo

See here clicky

simb