AegisAutos Holley Main Jet Kit 72-Piece (Sizes 64–99) — Brass 1/4"-32 Thread, Numbered Case

AegisAutos 72-piece main jet kit supplies two of each brass jet from sizes 64 through 99, organized in a numbered storage case for precise tuning of Holley 2010/2300/4150/4500 carburetors.

This comprehensive assortment gives tuners and mechanics the range needed to dial in fuel metering for many Holley performance carburetors. The kit includes 72 brass jets, two of every size between 64 and 99, in a compact plastic case with numbered compartments. Each jet uses a 1/4"-32 thread and is compatible with numerous Holley model numbers, making it a practical addition to any repair bench, track toolbox, or home garage.

How will these jets help me tune my Holley carburetor?

The variety of sizes lets you adjust main fuel flow to match engine modifications, altitude, or fuel grade without resorting to guesswork. Swapping jets changes the carburetor's fuel curve to improve throttle response and consistency across RPM ranges.

• Includes two of every size from 64–99 for gradual step changes.
• Brass construction resists wear and maintains accurate orifice dimensions.
• 1/4"-32 thread fits Holley 2010/2300/4010/4011/4150/4160/4500 models.
• Numbered case keeps sizes organized for quick jet swaps.

What exactly is included and how is it organized?

The kit contains 72 jets—two pieces for each integer size between 64 and 99—housed in a molded plastic case with marked slots. This layout prevents mixing and speeds identification during tuning sessions, reducing downtime at the workbench or track.

• 72 jets total: two of each size 64 through 99.
• Plastic storage box with numeric markings for each compartment.
• Compact footprint that fits toolbox drawers or garage shelves.
• Clear labeling reduces selection errors under pressure.

Are these jets durable and accurate enough for repeated tuning?

Made from high-quality brass, the jets resist corrosion and maintain their drilled orifice over repeated installation cycles. Brass is a standard material for carburetor jets due to its machinability and stable long-term dimensions, which support consistent metering results.

• High-quality brass construction for wear resistance.
• Precision-drilled orifices to keep fuel metering consistent.
• Two-of-each provision lets you keep spares on hand for track or field use.
• Easy to clean and reinstall between tuning runs.

Which Holley models and thread size are compatible with this kit?

The jets are designed to fit common Holley carburetor models including 2010, 2300, 4010, 4011, 4150, 4160 and 4500, all using a 1/4"-32 threaded main jet seat. Confirm your carburetor model and thread spec before installing to ensure proper fit and function.

• Fits Holley: 2010, 2300, 4010, 4011, 4150, 4160, 4500.
• Thread size: 1/4"-32 standard main jet thread.
• Recommended to verify model and jet seat before purchase.

Who is this for? The AegisAutos 36-181 main jet kit is aimed at hobbyist mechanics, performance tuners, restoration shops, and trackside crews who need a wide selection of main jets for carburetor dialing. If you work on Holley-based engines or frequently adjust fuel mixture for altitude, weather, or engine modifications, this kit supplies the range and organization to make tuning faster and more reliable. Contact AegisAutos support if you need help confirming compatibility before ordering.