mfg Posted October 25, 2017 Report Share Posted October 25, 2017 If they were to be used in competition, Studebaker recommended Champion type.....?...... spark plugs for their Avanti/Jet Thrust engines. Link to comment Share on other sites More sharing options...
studegary Posted October 26, 2017 Report Share Posted October 26, 2017 Champion J-61Y with a gap of 0.018" - 0.023" to the SIDE of the center electrode. Link to comment Share on other sites More sharing options...
mfg Posted October 26, 2017 Author Report Share Posted October 26, 2017 21 hours ago, studegary said: Champion J-61Y with a gap of 0.018" - 0.023" to the SIDE of the center electrode. J-61Y is the CORRECT answer! Link to comment Share on other sites More sharing options...
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