Reading spark plugs and re-jetting carburetors is tough enough—and it’s even tougher at the track where you probably don’t have a workbench nearby.

That’s why we’re particularly enamored with these new Mac Caddy Jet & Plug Organizers from Trick Flow.

Trick Flow Carburetor caddy jet and plug tray, 4150 white background
(Image/Trick Flow Specialties)

The trays fit snugly atop your carburetor (both 4150- and 4500-style models are available).

Not only does that make sure your jets and plugs stay close at hand, it covers your carburetor bore to ensure you don’t accidentally drop tiny jets, nuts, screws, or peanut shells down into the manifold.

But better still, it keeps your spark plugs and carburetor and/or nitrous jets tidy and organized.

Note the eight pairs of holes for the spark plugs too. That allows you to keep a second second set of gapped plugs ready on standby if you need them. It also means you can arrange your old plugs side by side in the right order to compare their condition in between runs—which can help a ton with your timing adjustments.

A pair of 4500 Trick Flow Carburetor caddies atop an engine
Running dual carbs on your setup? Just order another Mac Caddy and you’ll have twice the storage space. (Image/Trick Flow Specialties)

Finally, by having all your nitrous and carburetor jets arranged in a stepped sequence, it allows you to easily make incremental adjustments to your fuel/NOS mixture without having to fumble around the bottom of an organizer tray looking for the exact jet size you need.

And again, the Trick Flow folks include plenty of holes for spare jets too.

Ready to make your next ignition timing or A/F mix adjustment a heck of a lot easier? Toss one of these handy Mac Caddy storage trays in your race trailer.

Find all the details in this links below:

  • TFS-MAC4150-0 – Trick Flow Mac Caddy Tool Tray, for 4150-Style Carburetors
  • TFS-MAC4500-0 – Trick Flow Mac Caddy Tool Tray, for 4500-Style Carburetors

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Author: Paul Sakalas

Paul is the editor of OnAllCylinders. When he's not writing, you'll probably find him fixing oil leaks in a Jeep CJ-5 or roof leaks in an old Corvette ragtop. Thanks to a penchant for vintage Honda motorcycles, he spends the rest of his time fiddling with carburetors and cleaning chain lube off his left pant leg.