Spark PlugCross Reference
AUTOLITE 303
Compare interchangeable spark plugs for {brand} {part}. Check heat range, electrode gap, thread size, and reach before substituting — not all cross-referenced plugs perform the same in every engine.
214 matches found
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⚠ Important: Before substituting, confirm: same heat range, matching electrode gap, correct thread reach, and compatible resistor type.
ACCEL
3 matchesACDELCO
25 matchesR4473 total matchesM44C50 total matchesM4547 total matches4443 total matchesS4439 total matchesM42K37 total matchesB4535 total matchesC42-133 total matchesC4531 total matches4330 total matchesC4430 total matchesMB42K30 total matchesCR4324 total matchesR4324 total matchesS4223 total matches4122 total matchesC4321 total matchesB4320 total matchesMR44C18 total matchesSB4118 total matchesR43C13 total matchesMR42K10 total matchesCR43K9 total matchesM44B4 total matchesB40313 total matches
ALLISCHALMERS
1 matchesAUTOLITE
7 matchesBOSCH
19 matchesW9EC0229 total matchesW7EC216 total matchesWR9EC154 total matches241245592123 total matchesW240T3M123 total matches242225522110 total matchesW35T3110 total matchesWR8EC102 total matchesWS5E69 total matchesW8EC64 total matchesW145T345 total matchesW7E19 total matches024222952416 total matchesW175T316 total matchesWR8E13 total matchesW145TR311 total matches75086 total matches78094 total matches79084 total matches
BOSCH STK
3 matchesBRISK
1 matchesCATERPILLAR
1 matchesCHAMP STK
5 matchesCHAMPION
48 matchesJ6C177 total matches8231166 total matches823S166 total matchesJ6C/038166 total matchesJ6C/053166 total matchesJ6C/058166 total matchesK17C153 total matchesJ4C136 total matchesJ4C/T04131 total matches825C123 total matches825S123 total matchesJ4C/053123 total matchesRJ12C118 total matchesRJ12C/T04113 total matches5921110 total matches592C110 total matches592S110 total matchesRJ12C/014110 total matchesRJ12C/053110 total matchesRJ8C76 total matchesRJ8C/01474 total matchesRJ8C/T0474 total matches871173 total matchesCCH87173 total matchesRJ6C01467 total matchesRJ6C66 total matchesRJ6C/T0463 total matches82354 total matchesJ6J42 total matchesJ638 total matchesUJ632 total matchesJ530 total matches10227 total matchesRJ618 total matchesRJ6J17 total matchesJ914 total matchesJ9J13 total matchesJ10-COM12 total matchesJ10-COM-J12 total matchesJ5J12 total matchesJ64J12 total matchesJ6JM12 total matchesJ87B12 total matchesUJ6M12 total matchesXEJ54 total matchesXJ54 total matchesXJ64 total matchesXJ6J4 total matches
DENSO
22 matchesW17-U166 total matchesW16S-U137 total matchesW20SR-U124 total matchesL77JC123 total matchesW31S123 total matchesW20S-U118 total matches067600-680199 total matches067600-679196 total matchesW22S-U94 total matches067700-304184 total matchesW24S-U75 total matches067600-689171 total matches067600-688152 total matches307642 total matches307539 total matchesL78V31 total matchesL7827 total matches504423 total matchesW1721 total matchesL77V20 total matchesW16S19 total matchesW20S17 total matches
DENSO STK
5 matchesGM OEM NR
13 matchesHD
1 matchesMIGHTY
1 matchesMTRCRFT PN
18 matchesAS4C101 total matchesA547 total matchesA42N46 total matchesA7CX42 total matchesA5X37 total matchesA3X33 total matchesAT128 total matchesAT224 total matchesAR3122 total matchesAZ222 total matchesAT319 total matchesAT419 total matchesAZ319 total matchesAE116 total matchesAR4115 total matchesAR5112 total matches4761 total matchesSP-4761 total matches
MTRCRFT STK
2 matchesNAPA
6 matchesNGK
12 matchesNGK STK
4 matchesPRESTOLITE
10 matchesSEARS
1 matchesSPLITFIRE
3 matchesSTITT
1 matchesTORCH
1 matchesVALLEY FORGE
1 matchesFactory Direct
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