The Allstar Performance ALL40324 down nozzle breather rings are used on mechanical fuel injection nozzles. Each ring lets air pre-mix with fuel inside the nozzle, which eliminates engine vacuum drawing fuel into the engine. Once the engine is shut down, the cone style filter lets excess fuel evacuate the injection lines to help prevent fuel from entering the cylinders. Sold as a pack of 8.
Spec Sheet: View PDF
Specifications:
- Type: Down Nozzle Breather Ring with Filter
- Filter Style: Cone
- Application: Mechanical Fuel Injection Down Nozzles
- Function: Air pre-mixes with fuel in the nozzle; filter lets excess fuel evacuate the injection lines after shutdown
- Quantity: 8-Pack
- Low Profile Filter Version: ALL40325
- Part Number: ALL40324
FAQ
What do the ALL40324 down nozzle breather rings do?
The breather rings let air pre-mix with fuel inside the injection nozzle, which keeps engine vacuum from drawing fuel into the engine.
What does the filter do after the engine is shut off?
Once the engine is shut down, the filters let excess fuel evacuate the injection lines, which helps keep fuel from entering the cylinders.
How many breather rings come in the ALL40324?
The ALL40324 is a pack of 8 breather rings, each with a cone style filter.
What is the difference between the ALL40324 and ALL40325?
Both are Allstar down nozzle breather rings sold in packs of 8. The ALL40324 uses a cone style filter, while the ALL40325 uses a low profile filter.

