Brian I use and like the W3DPO plugs but they are $$
I have tried and had great luck also with Denso Iridium IW24 plugs. Just FYI
Cheers
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1981 411 rwhp, Ruf intercooler, 964 cams, Turbo Kraft injector blocks, Extrude honed intake, 7006 Turbo, Tial wastegate, RarlyL8 exhaust, MSD6al
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