| OP1 | Filters / Other | 89 xrefs from AUTOLITE, BALDWIN +23 more25 mfgs·409 OEM xrefs |
| OP111 | Filters / Oil | 64 xrefs from AMSOIL, AUTOLITE +23 more25 mfgs·304 OEM xrefs |
| OP123 | Filters / Oil | 31 xrefs from AMSOIL, BOSCH +21 more23 mfgs·133 OEM xrefs |
| OP124 | Filters / Other | 39 xrefs from AMSOIL, AUTOLITE +18 more20 mfgs·168 OEM xrefs |
| OP141 | Filters / Other | 26 xrefs from BALDWIN, CARQUEST +14 more16 mfgs·114 OEM xrefs |
| OP17 | Filters / Oil | 72 xrefs from AMSOIL, BALDWIN +21 more23 mfgs·389 OEM xrefs |
| OP173 | Filters / Oil | 40 xrefs from AMSOIL, AUTOLITE +17 more19 mfgs·248 OEM xrefs |
| OP193 | Filters / Oil | 98 xrefs from AMSOIL, BALDWIN +25 more27 mfgs·456 OEM xrefs |
| OP194 | Filters / Other | 98 xrefs from AMSOIL, BALDWIN +25 more27 mfgs·456 OEM xrefs |
| OP195 | Filters / Oil | 60 xrefs from AMSOIL, AUTOLITE +27 more29 mfgs·262 OEM xrefs |
| OP1A | Filters / Oil | 89 xrefs from AUTOLITE, BALDWIN +23 more25 mfgs·409 OEM xrefs |
| OP2167 | Filters / Oil | 122 xrefs from BALDWIN, BOSCH +22 more24 mfgs·531 OEM xrefs |
| OP241 | Filters / Oil | 150 xrefs from AMSOIL, AUTOLITE +25 more27 mfgs·659 OEM xrefs |
| OP252 | Filters / Oil | 234 xrefs from ACDELCO, BALDWIN +28 more30 mfgs·728 OEM xrefs |
| OP253 | Filters / Other | 40 xrefs from BALDWIN, BECK/ARNLEY +12 more14 mfgs·156 OEM xrefs |
| OP257 | Filters / Other | 120 xrefs from ACDELCO, AMSOIL +26 more28 mfgs·288 OEM xrefs |
| OP2821A | Filters / Other | 122 xrefs from AUTOLITE, BOSCH +25 more27 mfgs·565 OEM xrefs |
| OP288 | Filters / Oil | 30 xrefs from AMSOIL, CARQUEST +15 more17 mfgs·95 OEM xrefs |
| OP291 | Filters / Oil | 61 xrefs from ACDELCO, AMSOIL +28 more30 mfgs·232 OEM xrefs |
| OP33 | Filters / Oil | 27 xrefs from BALDWIN, COOPERS +15 more17 mfgs·159 OEM xrefs |
| OP40 | Filters / Oil | 27 xrefs from AUTOLITE, BALDWIN +13 more15 mfgs·168 OEM xrefs |
| OP4011 | Filters / Other | 40 xrefs from AMSOIL, AUTOLITE +17 more19 mfgs·248 OEM xrefs |
| OP42 | Filters / Other | 84 xrefs from AUTOLITE, BECK/ARNLEY +22 more24 mfgs·367 OEM xrefs |
| OP4457 | Filters / Oil | 74 xrefs from BALDWIN, BECK/ARNLEY +25 more27 mfgs·335 OEM xrefs |
| OP4458 | Filters / Oil | 31 xrefs from BALDWIN, BECK/ARNLEY +14 more16 mfgs·157 OEM xrefs |
| OP4459 | Filters / Other | 2 xrefs from BALDWIN1 mfg·38 OEM xrefs |
| OP4477 | Filters / Other | — |
| OP4619 | Filters / Other | 39 xrefs from BALDWIN, BECK/ARNLEY +16 more18 mfgs·159 OEM xrefs |
| OP4651 | Filters / Other | — |
| OP4670 | Filters / Other | — |
| OP49 | Filters / Oil | 33 xrefs from AMSOIL, BALDWIN +18 more20 mfgs·196 OEM xrefs |
| OP5 | Filters / Oil | 23 xrefs from BALDWIN, BOSCH +12 more14 mfgs·97 OEM xrefs |
| OP64 | Filters / Oil | 84 xrefs from AUTOLITE, BECK/ARNLEY +22 more24 mfgs·367 OEM xrefs |
| OP73 | Filters / Oil | 53 xrefs from BALDWIN, BOSCH +17 more19 mfgs·327 OEM xrefs |
| OP81 | Filters / Oil | 90 xrefs from AMSOIL, BALDWIN +24 more26 mfgs·450 OEM xrefs |
| OP85 | Filters / Other | 15 xrefs from BALDWIN, CARQUEST +10 more12 mfgs·94 OEM xrefs |
| OPA103 | Filters / Air | — |
| OPA110 | Filters / Other | 10 xrefs from BALDWIN, COOPERS +8 more10 mfgs·47 OEM xrefs |
| OPA110A | Filters / Air | 10 xrefs from BALDWIN, COOPERS +8 more10 mfgs·47 OEM xrefs |
| OPA113 | Filters / Air | 133 xrefs from ACDELCO, AMSOIL +32 more34 mfgs·504 OEM xrefs |
| OPA1149 | Filters / Air | 90 xrefs from BALDWIN, BOSCH +18 more20 mfgs·374 OEM xrefs |
| OPA120 | Filters / Air | 21 xrefs from ACDELCO, BALDWIN +13 more15 mfgs·47 OEM xrefs |
| OPA124 | Filters / Air | 23 xrefs from BALDWIN, BOSCH +10 more12 mfgs·135 OEM xrefs |
| OPA129 | Filters / Other | 9 xrefs from BALDWIN, DONALDSON +6 more8 mfgs·85 OEM xrefs |
| OPA131 | Filters / Air | 19 xrefs from AMSOIL, BALDWIN +14 more16 mfgs·105 OEM xrefs |
| OPA15 | Filters / Other | 36 xrefs from BALDWIN, BECK/ARNLEY +18 more20 mfgs·168 OEM xrefs |
| OPA16 | Filters / Air | 48 xrefs from BALDWIN, BOSCH +19 more21 mfgs·248 OEM xrefs |
| OPA31 | Filters / Air | 26 xrefs from BALDWIN, CARQUEST +16 more18 mfgs·101 OEM xrefs |
| OPA3137 | Filters / Air | 18 xrefs from ACDELCO, BALDWIN +14 more16 mfgs·28 OEM xrefs |
| OPA3138 | Filters / Air | 14 xrefs from BALDWIN, DONALDSON +9 more11 mfgs·106 OEM xrefs |
