Trivia: the 4 ground plugs are for rotary engines. My roommate's 83 RX7 GSL came with them from the factory, and won't run on anything but.

FYI: our 2001 Tacoma with the 5VZ has a sticker on the timing belt cover that says use twin ground plugs only.


My Truck: 1987 XtraCab DLX 22R 4WD 5 Speed Manual
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"Speed has never killed anyone. Suddenly becoming stationary, that's what gets you." -Jeremy Clarkson