Review on 🔥 Enhance Performance with NGK Iridium IX Spark Plug LFR7AIX # 2309 PK4 by Phil Show

For Genesis Coupe owners I can confirm that they will fit 2013 2.0T (although Revain claims this is not the case). This is the same model of 1-stage cooler spark plugs recommended by BTR and SFR tuners. Some gaps are very different from their boxes, so check your owner's manual or tuner for spark plug gap recommendations. I'm glad I bought the clearance tool with them. I've used them prior to my exhaust, intake and exhaust valve setup with no issues. However, most tuners and the community agree that these spark plugs are only really needed if you plan to add more power (through tuning or otherwise). I adjusted them to my standard 0.028 inch spacing with no problem. The machine runs smoother than my old spark plugs and now that I've adjusted it runs stronger.