4x brand new IFR6J11 7658 Laser Iridium Spark Plugs New aftermarket spark plugs, laser iridium type. Model/type: IFR6J11 Marked “NGK”, but authenticity not verified, so sold strictly as aftermarket plugs. Compatible with vehicles that use IFR6J11-type plugs (buyer must confirm fitment). Specifications (as labelled): • Thread: 14mm • Reach: 19mm • Hex: 16mm • Laser iridium-style centre electrode
eBay