Description
Part Number: 121-135
Holley Main Jet Assortment Kit (Sizes 64 to 99)
Comprehensive brass main jet tuning kit designed for precise fuel calibration on Holley performance carburetors.
Key Features
- ✓ Includes two of every jet size from 64 through 99 for complete tuning flexibility
- ✓ Standard 1/4″-32 UNF thread fits most Holley 2300, 4150, and 4160 carburetors
- ✓ Manufactured from high-grade brass for accurate fuel flow control and long service life
- ✓ Stored in a durable plastic organizer case with clearly labelled compartments
- ✓ Essential kit for trackside calibration, dyno tuning, and atmospheric adjustments
Technical Specifications
| Brand | Holley |
|---|---|
| Manufacturer Part Number | 121-135 |
| Jet Sizes Included | 64 to 99 (2 of each size, 72 total) |
| Thread Pitch | 1/4″-32 UNF |
| Material | High-Precision Machined Brass |
| Compatibility | Holley 2300, 4150, 4160, 4175, and 4500 Series Carburetors |
What’s Included in the Box
- 36 Pairs of Holley Brass Main Jets (Sizes 64 through 99)
- Heavy-Duty Molded Plastic Compartment Case with Printed Jet Size Chart
As an industry leader in fuel delivery for over a century, Holley carburetors and tuning components are trusted by championship-winning drag racers and circuit teams globally. When you purchase your Holley 121-135 jet kit from JP Racing, you receive guaranteed genuine components backed by specialist technical support and rapid UK dispatch.
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