I have new NGK G-Power Platinum Spark Plugs originally bought for a 94 cobra, can I use those on a 93 gt? Someone said they won't work because of like a heat rating of 4 or something along those lines.
The heat range isn’t the problem but I don’t think that they will work. The motors in question have different cylinder heads. I don’t think the ones for the cobra will thread into the hole. If they do thread in they’ll either be too long or too short. Ha I’m not sure which direction, but I’m pretty certain they won’t fit.
Get some copper plugs. Not only are they cheaper, but copper is more conductive than platinum. Autolite 25. https://m.autozone.com/external-engi...05833_0_0_1489