Administrators hughezee Posted December 25, 2019 Administrators Report Share Posted December 25, 2019 Answering a commonly searched subject and trying to steer avid DIYers away from other well-known brands that I wouldn't even recommend to my worst enemy. These are my most widely used spark plugs. **NGK ZFR6F-11 Standard Spark Plug** DENSO KJ16CR-L11 Standard Spark Plug DENSO KJ20CR-L11 Standard Spark Plug They're very few real-world benefits of using iridium spark plugs in the F-series engine (H22 engine excluded). However, with the introduction of E10 fuel, they can offer better performance over standard plugs. NGK ZFR6FIX-11 Iridium IX Spark Plug DENSO IK16TT Iridium TT Spark Plug DENSO IK20TT Iridium TT Spark Plug NGK LPG6LPG LPG6 Standard Spark Plug 4 1 Link to comment Share on other sites More sharing options...
Founding Member Retro Rich Posted March 29, 2020 Founding Member Report Share Posted March 29, 2020 You can't go wrong with either Denso or NGK 2 1 Link to comment Share on other sites More sharing options...
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