FYI Plug cross reference for 1990 Sambar Supercharge: ZFR6G NGK plugs cross to: NGK ZFR6G replacement spark plugs Denso K20DTR-S11 Denso K20DTRS11 Subaru 22401 KA140 Subaru 22401 KA160 Subaru 22401-KA140 Subaru 22401-KA160 Subaru 22401KA140 Subaru 22401KA160 Tacti V91102020 Tacti V91103198 Toyota 90098-70074 NGK BKR5E plugs cross to: ACDelco 41-627 ACDelco 41800 ACDelco 41801 ACDelco AC5 ACDelco FR1LS ACDelco FR2LS ACDelco FR3CLS6 ACDelco FR3LS ACDelco FR3LS6 Autolite 3924 Beck Arnley 176-5234 Beru 14F-8LUR Beru 14FR-8DUX Beru UXT1 Beru UXT3 Beru Z73 Bosch +19 Bosch 0242229660 Bosch F000KE0P41 Bosch FR7DC+ Bosch FR7DCX+ Bosch FR8D+X Bosch FR8DCX Bosch FR8DCX+ Bosch FR8DPX Bosch FR8DX Bosch stk 7557 Brisk A-line 36 Brisk A-Line36 Brisk DR17YPP-1 Champion 2430 Champion 7440 Champion OE062 Champion OE063 Champion OE137 Champion OE152 Champion RC10YC4 Champion RC10YCC4 Champion RC10YX4 Champion RC12YC Champion RC12YC5 Champion RC12YCC4 Champion RC14YC4 Champion RC8YC4 Champion stk 71 Daihatsu 90048-51158-000 Daihatsu 90048-51158-008 Daihatsu 9004851157000 Denso 3130 Denso 5303 Denso D21 Denso IK16 Denso K14P-U11 Denso K14PU11 Denso K16PR-U11 Denso K16PRU11 Denso K16TT Denso Iridium IK16 Denso Iridium stk 5303 Denso stk 3130 Eyquem RFC52LS5 General Motors 25177454 General Motors 5614062 Honda 98079-5514E Honda 98079-5514E-H0 Honda 98079-5515E Isuzu 5-8600-7635-0 Isuzu 5-8612-3951-0 Jap Car 277200 Jap Car 277201 Magneti Marelli CT5KMMR11 Mazda 0000-18-BP01 Mazda 1Y09-18-110 Mazda BP01 18 110 Mazda BP01-18-110 Mazda BP0118110 Mazda BP02-18-110 Mazda BP13 18 110 Mazda BP1318110 Mazda BPY1-18-110 Mazda PBP01-18-110AA Mitsubishi MS 851 357 Mitsubishi MS 851 727 Mitsubishi MS851357 Mitsubishi MS851387 Mitsubishi MS851727 Mopar 56006240 Motorcraft 1Y09 Motorcraft AGSP32C Motorcraft AGSP32CF4 Motorcraft stk 6 NGK stk 6953 Nissan -50Y05 Nissan -85E15 Nissan 22401-1F720 Nissan 22401-50Y05 Nissan 22401-50Y05-Q0 Nissan 22401-50Y05-VA Nissan 22401-50Y05-W0 Nissan 22401-50Y75 Nissan 22401-50Y75-W0 Nissan 50Y05 Nissan 85E15 Subaru 22401-KA200 Subaru 22401-KA210 Subaru 22401KA200 Subaru 22401KA210 Suzuki 09482-00497 Suzuki 09482-00566 Torch K5RF11 Torch K6RTC Toyota 90048-51158 Toyota 90098-66038 Toyota 90098-66047 Unipart GSP2045 Valeo 246872
None of the ZFR6G alternatives are in production any longer. Subaru now calls for the BKR5E-11 in the 1990-early 1991 Supercharged engines. They can be easily found at any car parts store, because as you see there are a lot of makes that use it on various models. The rest of the supercharged years call for BKR6E-11.
Correct but one can still source the ZFR6G plugs off various sites in a pinch. My local FLAPS did not have BKR5E-11 plugs but is crosses to Autolite 3924. So I'm using those. Runs nice.
