- Fuel, Carbs & Intakes
- Carburetor Tuning Components
- Carburetor Vacuum Secondary Kits & Components
- JEGS Vacuum Secondary Spring Kit
JEGS Secondary Spring Kit includes one each of seven different springs for tuning the vacuum secondary on most Holley® style carburetors.
| Spring Color | Pressure |
| White | Lightest |
| Yellow (short) | Lighter |
| Yellow | Light |
| Purple | Medium |
| Plain | Heavy |
| Brown | Heavier |
| Black | Heaviest |
