gadgetball Posted January 9, 2021 Share Posted January 9, 2021 Motorcraft SP-534? 542? 580? Something else? Does anyone know the difference between these? Only performance mods are Air Raid CAI, TRQ Ignition Coils ICA64254 For best performance (without ruining the engine) what gap can I do? .030? .031? .028? Quote Link to comment Share on other sites More sharing options...
bbf2530 Posted January 10, 2021 Share Posted January 10, 2021 2 hours ago, gadgetball said: Motorcraft SP-534? 542? 580? Something else? Does anyone know the difference between these? Only performance mods are Air Raid CAI, TRQ Ignition Coils ICA64254 For best performance (without ruining the engine) what gap can I do? .030? .031? .028? Hi gadgetball. Best advice I can offer is to use the plugs and gap specified in the Maintenance and Specifications section of your Owners Manual. Personally, I would also advise sticking with the Motorcraft brand plugs, since some other "OEM" brands do not work and play well with Ford engines. If you do not have your Owners Manual, you can download the PDF version here: https://www.fleet.ford.com/parts-service/resources/owner-manuals/ Let us know how you make out and good luck. Quote Link to comment Share on other sites More sharing options...
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