The NGK Iridium IX BKR9EIX is a set of four iridium-tipped spark plugs aimed at performance enthusiasts. A fine-wire iridium center electrode and tapered cut ground electrode are the core of the design, which NGK says improves ignitability, starting, idling and throttle response while resisting fouling. Iridium's high melting point and hardness make these a long-life upgrade over standard nickel plugs and a step up from many platinum plugs. They are a common choice for tuned or high-revving engines that call for a colder heat range; NGK's own Ruthenium HX line sits above them for those wanting the longest service life.
In stockShips from Canada · duties may applyReturn policy
Owners of performance and modified cars commonly fit these as a durability and response upgrade over stock plugs, and report clean starting and steady idle. Most criticism centers on cost and on choosing the correct heat range rather than the plug's build.
NGK Iridium IX spark plugs are designed for performance enthusiasts. They are built to provide acceleration, fuel efficiency and durability. They offer extreme ignitability and exceptional anti-fouling.
The center electrode is made of fine-wire iridium alloy, which is six times harder than platinum. The alloy has a very high melting point. The ground electrode has a tapered cut, which improves starting, idling and throttle response.
