[pappy]

Not sure this helps or not. Toyota only lists one plug for the 22r/re engines 1981-1995, W16EXR-U. They also list an optional "platinum/iridium" plug, P16R with the gap reset to factory specs.

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Along the same lines of confusion ... The 3FE was used from 1988-1992 in the FJ62 and FJ80 Land Cruisers. The engine is mostly the same (different coil/ignitor), and Toyota specs two different plugs. The 3FE in the FJ62 uses the 22RE plug above, W16EXR-U. The 3FE in the FJ80 uses W16EXR-U11. Go figure what the "11" means. Plus, both 3FEs use the same optional "platinum/iridium" plug, P16R, but the plugs for the FJ62 need to be regaped to factory specs (.032"), while the plugs in the FJ80 do not get the gap reset out of the box (.044"?). My guess is the '11' indicates same plug, but larger gap out of the box.

NGK, of course, lists (mostly) different plugs for the two engines.