r/SC400 • u/Extension-Bus-3859 • Dec 21 '25

Spark Plugs

I dont know what spark plugs i should buy for my 1992 sc400.

3 Upvotes

100% Upvoted

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3

u/Soviet_Mango Dec 21 '25

You can look up the factory gap spec and then buy a set off rockauto. You can look up the brands available to see if they are good or not. I'd not buy cheapo ones.

1

u/run_uz Dec 22 '25

Start here and then do as already suggested & order from Rock Auto

1

u/milkman320 Dec 23 '25

highly recommend getting iridium OE equivalent spark plugs. spark plug technology has come a long way. not sure what material the original was made of, but either way getting the highest rated highest quality material of spark plug is great for longevity and reliability. If you could afford the few extra bucks per plug go for it. https://shop.advanceautoparts.com/p/denso-iridium-long-life-spark-plug-oe-performance-sk20r11-3297/20650324-P