| Throttle Body Connector Kit (3) | eficonversions.com | 18.92 USD | 22.8 USD | −17% |
| Throttle Position (TP) Sensor Connector Kit (4) | eficonversions.com | 16.94 USD | 20.4 USD | −17% |
| Manifold Absolute Pressure (MAP) Sensor Connector Kit (2) | eficonversions.com | 28.6 USD | 34.4 USD | −16.9% |
| Supercharger Air Inlet Pressure Sensor Connector Kit (1) | eficonversions.com | 28.6 USD | 34.4 USD | −16.9% |
| Transmission Connector Kit (2) 4L80E 4L85E | eficonversions.com | 25.19 USD | 30.3 USD | −16.9% |
| Transmission Connector Kit (1) 4L60E 4L65E | eficonversions.com | 25.63 USD | 30.8 USD | −16.8% |
| Throttle Position (TP) Sensor Connector Kit (1) | eficonversions.com | 20.46 USD | 24.6 USD | −16.8% |
| Supercharger Bypass Valve Solenoid Connector Kit | eficonversions.com | 17.05 USD | 20.5 USD | −16.8% |
| Vehicle Speed Sensor (VSS) Connector Kit (2) | eficonversions.com | 15 USD | 18 USD | −16.7% |
| Throttle Body Connector Kit (2) | eficonversions.com | 15 USD | 18 USD | −16.7% |
| Manifold Absolute Pressure (MAP) Sensor Connector Kit (1) | eficonversions.com | 15 USD | 18 USD | −16.7% |
| Knock Sensor Sub Harness Connector Kit | eficonversions.com | 15 USD | 18 USD | −16.7% |
| Knock Sensor (KS) Connector Kit (3) Flat Response Type | eficonversions.com | 15 USD | 18 USD | −16.7% |
| Throttle Body Connector Kit (1) | eficonversions.com | 15 USD | 18 USD | −16.7% |
| Input Shaft Speed (ISS) Sensor Connector Kit (2) | eficonversions.com | 15 USD | 18 USD | −16.7% |
| Throttle Body Motor Connector Kit | eficonversions.com | 15 USD | 18 USD | −16.7% |
| GM LSA Engine (Drive-by-Cable) Harness Assembly for HP Tuners CORE ECU by EFI Connection | eficonversions.com | 9140 USD | — | — |
| GM LSA Engine (Drive-by-Wire) Harness Assembly for HP Tuners CORE ECU by EFI Connection | eficonversions.com | 9140 USD | — | — |
| GM Gen III LS Engine (Drive-by-Wire & Multec 2 Injectors) & Manual Transmission Harness Assembly for HP Tuners CORE ECU by EFI Connection | eficonversions.com | 8996 USD | — | — |
| GM Gen III LS Engine (Drive-by-Wire & Multec 2 Injectors) & 4L80E Automatic Transmission Harness Assembly for HP Tuners CORE ECU by EFI Connection | eficonversions.com | 8996 USD | — | — |
| GM Gen III LS Engine (Drive-by-Wire & Multec 2 Injectors) & 4L60E Automatic Transmission Harness Assembly for HP Tuners CORE ECU by EFI Connection | eficonversions.com | 8996 USD | — | — |
| GM Gen III LS Engine (Drive-by-Cable & Multec 2 Injectors) & Manual Transmission Harness Assembly for HP Tuners CORE ECU by EFI Connection | eficonversions.com | 8900 USD | — | — |
| GM Gen IV LS Engine (Drive-by-Cable) & Manual Transmission Harness Assembly for HP Tuners CORE ECU by EFI Connection | eficonversions.com | 8900 USD | — | — |
| GM Gen III LS Engine (Drive-by-Cable & Multec 2 Injectors) & 4L80E Automatic Transmission Harness Assembly for HP Tuners CORE ECU by EFI Connection | eficonversions.com | 8900 USD | — | — |
| GM Gen IV LS Engine (Drive-by-Cable) & 4L60E Automatic Transmission Harness Assembly for HP Tuners CORE ECU by EFI Connection | eficonversions.com | 8900 USD | — | — |
| GM Gen IV LS Engine (Drive-by-Cable) & 4L80E Automatic Transmission Harness Assembly for HP Tuners CORE ECU by EFI Connection | eficonversions.com | 8900 USD | — | — |
| GM Gen III LS Engine (Drive-by-Cable & EV1 Injectors) & 4L60E Automatic Transmission Harness Assembly for HP Tuners CORE ECU by EFI Connection | eficonversions.com | 8900 USD | — | — |
| GM Gen III LS Engine (Drive-by-Cable & EV1 Injectors) & 4L80E Automatic Transmission Harness Assembly for HP Tuners CORE ECU by EFI Connection | eficonversions.com | 8900 USD | — | — |
| GM Gen III LS Engine (Drive-by-Cable & Multec 2 Injectors) & 4L60E Automatic Transmission Harness Assembly for HP Tuners CORE ECU by EFI Connection | eficonversions.com | 8900 USD | — | — |
| GM Gen III LS Engine (Drive-by-Cable & EV1 Injectors) & Manual Transmission Harness Assembly for HP Tuners CORE ECU by EFI Connection | eficonversions.com | 8900 USD | — | — |
| ECU Extension Harness A B C and D for CORE ECU | eficonversions.com | 2887 USD | — | — |
| Connector Kit Bundle - Gen IV 58x DBC w/ EV6 Injectors - CORE ECU | eficonversions.com | 2181 USD | — | — |
| Connector Kit Bundle - Gen IV 58x DBW w/ EV6 Injectors - CORE ECU | eficonversions.com | 2177 USD | — | — |
| Connector Kit Bundle Gen III 24x DBW w/ Multec 2 Injectors - CORE ECU | eficonversions.com | 2091 USD | — | — |
| Connector Kit Bundle Gen III 24x DBC w/ Multec 2 Injectors - CORE ECU | eficonversions.com | 1987 USD | — | — |
| Connector Kit Bundle - Gen III 24x DBW w/ EV1 Injectors - CORE ECU | eficonversions.com | 1883 USD | — | — |
| Connector Kit Bundle - Gen III 24x DBC w/ EV1 Injectors - CORE ECU | eficonversions.com | 1839 USD | — | — |
| Electrical Center Fuse Block Connector Kit for CORE ECU | eficonversions.com | 1588 USD | — | — |
| Engine Control Unit ECU Connector Kit Genuine AMP Connectors for CORE ECU | eficonversions.com | 1019 USD | — | — |
| Engine Control Unit ECU Connector Kit Aftermarket Connectors for CORE ECU | eficonversions.com | 816 USD | — | — |