| Manufacture | Number |
| Herko Automotive | WFOR15 |
| Year | Make | Model | Engine | Notes |
| 1991 | Ford | Mustang | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | Dual Plug Eng; OE Perf Plus; |
| 1992 | Ford | Mustang | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | Dual Plug Eng; OE Perf Plus; |
| 1993 | Ford | Mustang | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1991 | Ford | Mustang | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | Dual Plug Eng; OE Perf Plus; |
| 1991 | Ford | Mustang | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | Dual Plug Eng; OE Perf Plus; |
| 1992 | Ford | Mustang | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | Dual Plug Eng; OE Perf Plus; |
| 1992 | Ford | Mustang | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | Dual Plug Eng; OE Perf Plus; |
| 1993 | Ford | Mustang | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1993 | Ford | Mustang | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1992 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1992 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1992 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1993 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1993 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1994 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1994 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1993 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1994 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1994 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1992 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1992 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1993 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1993 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1993 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1993 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1994 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1994 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1992 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1992 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1993 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1993 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1994 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1994 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1994 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1994 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1994 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1995 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1995 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1995 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1995 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1996 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1996 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1996 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1996 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1997 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1997 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1997 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1992 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| 1992 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | OE Perf Plus; |
| Year | Make | Model | Engine | Trim | Notes |
| 1991 | Ford | Mustang | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | LX Convertible 2-Door | Dual Plug Eng; OE Perf Plus; |
| 1992 | Ford | Mustang | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | LX Convertible 2-Door | Dual Plug Eng; OE Perf Plus; |
| 1993 | Ford | Mustang | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | LX Convertible 2-Door | OE Perf Plus; |
| 1991 | Ford | Mustang | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | LX Sedan 2-Door | Dual Plug Eng; OE Perf Plus; |
| 1991 | Ford | Mustang | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | LX Hatchback 2-Door | Dual Plug Eng; OE Perf Plus; |
| 1992 | Ford | Mustang | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | LX Sedan 2-Door | Dual Plug Eng; OE Perf Plus; |
| 1992 | Ford | Mustang | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | LX Hatchback 2-Door | Dual Plug Eng; OE Perf Plus; |
| 1993 | Ford | Mustang | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | LX Sedan 2-Door | OE Perf Plus; |
| 1993 | Ford | Mustang | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | LX Hatchback 2-Door | OE Perf Plus; |
| 1992 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | Custom Standard Cab Pickup 2-Door | OE Perf Plus; |
| 1992 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | Custom Extended Cab Pickup 2-Door | OE Perf Plus; |
| 1992 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | S Standard Cab Pickup 2-Door | OE Perf Plus; |
| 1993 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | STX Standard Cab Pickup 2-Door | OE Perf Plus; |
| 1993 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | STX Extended Cab Pickup 2-Door | OE Perf Plus; |
| 1994 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | STX Standard Cab Pickup 2-Door | OE Perf Plus; |
| 1994 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | STX Extended Cab Pickup 2-Door | OE Perf Plus; |
| 1993 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | Splash Standard Cab Pickup 2-Door | OE Perf Plus; |
| 1994 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | Splash Standard Cab Pickup 2-Door | OE Perf Plus; |
| 1994 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | Splash Extended Cab Pickup 2-Door | OE Perf Plus; |
| 1992 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | Sport Standard Cab Pickup 2-Door | OE Perf Plus; |
| 1992 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | Sport Extended Cab Pickup 2-Door | OE Perf Plus; |
| 1993 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | Sport Standard Cab Pickup 2-Door | OE Perf Plus; |
| 1993 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | Sport Extended Cab Pickup 2-Door | OE Perf Plus; |
| 1993 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | XL Standard Cab Pickup 2-Door | OE Perf Plus; |
| 1993 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | XL Extended Cab Pickup 2-Door | OE Perf Plus; |
| 1994 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | XL Standard Cab Pickup 2-Door | OE Perf Plus; |
| 1994 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | XL Extended Cab Pickup 2-Door | OE Perf Plus; |
| 1992 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | XLT Standard Cab Pickup 2-Door | OE Perf Plus; |
| 1992 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | XLT Extended Cab Pickup 2-Door | OE Perf Plus; |
| 1993 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | XLT Standard Cab Pickup 2-Door | OE Perf Plus; |
| 1993 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | XLT Extended Cab Pickup 2-Door | OE Perf Plus; |
| 1994 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | XLT Standard Cab Pickup 2-Door | OE Perf Plus; |
| 1994 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | XLT Extended Cab Pickup 2-Door | OE Perf Plus; |
| 1994 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | Base Standard Cab Pickup 2-Door | OE Perf Plus; |
| 1994 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | Base Extended Cab Pickup 2-Door | OE Perf Plus; |
| 1994 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | SE Standard Cab Pickup 2-Door | OE Perf Plus; |
| 1995 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | Base Standard Cab Pickup 2-Door | OE Perf Plus; |
| 1995 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | Base Extended Cab Pickup 2-Door | OE Perf Plus; |
| 1995 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | SE Standard Cab Pickup 2-Door | OE Perf Plus; |
| 1995 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | SE Extended Cab Pickup 2-Door | OE Perf Plus; |
| 1996 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | Base Standard Cab Pickup 2-Door | OE Perf Plus; |
| 1996 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | Base Extended Cab Pickup 2-Door | OE Perf Plus; |
| 1996 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | SE Standard Cab Pickup 2-Door | OE Perf Plus; |
| 1996 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | SE Extended Cab Pickup 2-Door | OE Perf Plus; |
| 1997 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | Base Standard Cab Pickup 2-Door | OE Perf Plus; |
| 1997 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | SE Standard Cab Pickup 2-Door | OE Perf Plus; |
| 1997 | Mazda | B2300 | 2.3L 2295CC l4 GAS SOHC Naturally Aspirated | SE Extended Cab Pickup 2-Door | OE Perf Plus; |
| 1992 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | STX Extended Cab Pickup 2-Door | OE Perf Plus; |
| 1992 | Ford | Ranger | 2.3L 140Cu. In. l4 GAS SOHC Naturally Aspirated | STX Standard Cab Pickup 2-Door | OE Perf Plus; |