Engine Kits

Air Flo Air Cleaner Insert Holley and Demon 4-bbls
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Air Flo Air Cleaner Insert Holley and Demon 4-bbls



Part #: 20001
List Price: $55.89
Our Price: $27.57
You Save: $28.32

Availability: In Stock



Works with Holley and Demon 4-bbls with-out a choke horn (tower). Professional Products - AirFlo Air Cleaner Insert is the easiest and lest expensive horsepower you will ever buy 

It really does increase power

To date two separate dyno tests have been run with the Airflo insert in two different dyno facilities and on two different engines. On one test Professional Products used a Demon carburetor and were getting increases of 7 horsepower. The second test used a Holley carb and Professional Products got an increases of 10 hp. The second was on a 600 hp racing engine and the 10 hp gain was comparing the Airflo in a conventional street type air cleaner to a tall racing air cleaner without the Airflo. Users report improved throttle response and an increase in fuel economy as well.

How does the Airflo work?

The incoming air on a round air cleaner is drawn in through the outer diameter of the air cleaner by engine vacuum. As this air rushes towards the center of the air cleaner it collides with itself creating turbulence. This turbulence slows down the entry of the incoming air into the carburetor just enough to affect the power output of the engine. The AIRFLO simply provides a smooth transition from the perimeter of the air cleaner down into the carburetor venturis. By eliminating the turbulence, it actually helps get more air into the engine. More air draws in more fuel from the carburetor and more air and fuel means more horsepower.

Installing the Airflo

Simply remove your air cleaner top, determine if you need to use any of the supplied spacers to fit your air cleaner, drop the various elements of the AIRFLO down over the center stud, put the air cleaner top back on, and you are done. It's just that easy. (On models with a choke tower and a very low air cleaner, you may have to align the top piece with the carb.)


Parts included with Airflo.

Adjustable Yes
Brand Professional Products
Insert Finish Black
Insert Height 3.30 in.-6.40 in.
Insert Material Plastic
Notes Universal fit for Holley or Demon carburetors without a choke tower.
Part Type Air Cleaner Inserts
Product Line Professional Products Airflo Air Cleaner Inserts
Quantity Sold individually.