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Carburetor Jet
These metering orifices control fuel flow into the metering system. They are rated in flow capacity cubic centimeters per minute and are changeable for tuning purposes. The shape of the entry; exit; and size determines flow. All Holley Main jets are flow tested and then stamped with the correct number. Click on Catalog Product Page for complete listing of jets and sizes.
Holley Performance Emission Code 5: This part is legal for sale or use on Emissions Controlled Vehicles; Uncontrolled (Non-Emissions Controlled) Vehicles; and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations
| Carburetor Type | Holley |
| Jet Number | 66 |
| Jet Size | .066 inch |
| Brand | Holley |
| Category | Air and Fuel Delivery |
| Emission Code | 5 |
| Grade Type | Performance |
| Head Diameter | 0.31 IN |
| Length | 0.35 IN |
| Material | Brass |
| 6453 | 0.066 IN |
| Part Type | Carburetor Metering Jet |
| Product Type | Standard Main Jet |
| Sub Category | Carburetion |
| Thread Diameter | 1/4-32 IN |
| Warning | California Proposition 65 |
| Warranty | Manufacturer's Limited 90 Day Warranty |
| Country of Origin (Primary) | US |
| Harmonized Tariff Code (Schedule B) | 8409915085 |
| Harmonized Tariff Code (HTS) | 8409915085 |
| NAFTA Preference Criterion Code | B |
| Remanufactured Part | N |
| Warranty Special | Manufacturer's Limited 90 Day Warranty |
| Warranty Special UOM | TX |
| EAR99 | |
| UPC | 00090127021620 |
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