M177-M178 HKS Spark Plug set (4.0l Biturbo) Streetwear Fashion Stock / mild tune: ~0

Stock / mild tune: ~0

Direct OEM Fitment – installs seamlessly

Less restriction = Increased power

and no more corrosion on the center hub like factory 1 piece design

improved throttle response

M177-M178 HKS Spark Plug set (4.0l Biturbo) Streetwear Fashion Stock / mild tune: ~0HKS Spark Plugs to suit M177 M178 4. 0 litre BiTurbo engines. (set of 8) A noticeable difference in performance over other brands. Iridium Alloy Center Electrode Iridium alloy center electrode reduces voltage requirement and improves ignition performance and durability. Outer Electrode with Platinum Chip The outer electrode incorporates a square platinum chip which improves durability, and combining with the iridium center electrode boosts ignition