BKR7EIX-11 : one grade colder than standard, for lightly tuned or sporty engines, used both on the road or the track
BKR8EIX : two grades colder than standard, for tuned and powerful engines used mainly on the track ( *** These plugs will need gapping. *** )
BKR9EIX : improved throttle response and superior anti fouling. superior anti-corrosion and anti-seizing properties. Outstanding acceleration, high fuel efficiency and durability. Ultimate design, technology and performance. Heat Grade 9. ( **** These plugs will need gapping. *** )
