2 MULE TEAM Holley Carburetor Main Jet Assortment Kit 36-181 — Brass #64–#99, 72‑Piece 1/4‑32 Thread Organiser

2 MULE TEAM 36-181 is a 72-piece solid-brass main jet replacement assortment for Holley-style carburetors that gives you a wide range of calibrated sizes to tune fuel delivery precisely.

If you rebuild, tune, or maintain Holley-series carburetors — models such as 2010, 2300, 4010, 4011, 4150, 4160 and 4500 — this kit supplies multiple main jet sizes in 1/4-32 thread to help dial in air/fuel metering. The jets arrive in a clear, compartmentalized organizer with each caliber clearly marked so you can swap jets quickly trackside or in the shop. Manufactured from solid brass for corrosion resistance and consistent flow characteristics, the assortment covers common sizes from #64 through #99 and is intended as a direct replacement or a handy tuning set for performance adjustments and maintenance.

How will these jets affect tuning results?

Swapping main jets changes the amount of fuel delivered at higher throttle openings, letting you fine-tune the air/fuel ratio under load. Because the kit spans a wide numerical range, you can incrementally richen or lean out the circuit until the engine responds as desired.

• Covers sizes #64–#99 for broad tuning adjustments.
• 1/4-32 thread matches common Holley main jet fittings.
• Two identical sets increase availability for testing and spares.

Which carburetor models and applications does this kit fit?

The 36-181 assortment is designed for Holley-type carbs and lists direct compatibility with several popular Holley model families. It works for street rebuilds, track tuning, and vintage restoration where those main jet sizes and thread form are used.

• Compatible with Holley 2010 and 2300 series.
• Fits Holley 4010 / 4011 and 4150 / 4160 main jet housings.
• Also suitable for many 4500-series applications requiring 1/4-32 jets.
• Verify your carburetor’s thread and required jet number before fitting.

What does the kit include and how is it organized?

Inside the compact plastic organizer you’ll find every jet size clearly labeled and separated to prevent mix-ups. The kit ships with two matched sets so you have extra copies of each size for multi-carb setups or as spares during tuning sessions.

• Total of 72 brass jets: two of each size from #64 through #99.
• Each compartment marked with the jet number for fast selection.
• Clear lid and durable case for garage, toolbox, or pit use.
• Brass material helps resist corrosion and wear in fuel environments.

How do I choose which jet to try first?

Start with the factory-recommended or previously installed jet size as your baseline, then change one increment at a time while monitoring throttle response and spark plug appearance. Small adjustments let you evaluate real behavior without creating large air/fuel swings.

• Use the stock jet as a reference point.
• Change one size up or down and test under the same load conditions.
• Inspect plugs and drivability for evidence of rich or lean running.
• Document each change so you can reverse unwanted results quickly.

Who is this for: Mechanics, restorers, and performance enthusiasts who service Holley-family carburetors and need a durable, wide-ranging set of main jets for tuning, repair, or spares. If you want a ready-to-use assortment that covers common jet numbers, comes in a labeled organizer, and uses standard 1/4-32 threads, the 2 MULE TEAM 36-181 kit is built to make swapping and testing faster and more reliable.