Description
Overview
The FASS Fuel Systems Drop-In Series Heater Probe Adapter Bushing (Part No: HB-2001) is a purpose-built fitting engineered to let you integrate the FASS Heater Probe kit with your FASS Drop-In Series Fuel System. If you run a FASS Drop-In Series fuel system in your diesel truck or SUV and want to add cold-weather heater probe capability, this adapter bushing is the connection piece that makes it possible.
Precision-machined with an -8 ORB male fitting on one end and a 1/4 inch NPT female thread on the other, the HB-2001 bridges the thread and port differences between the FASS Heater Probe kit and the Drop-In Series housing. Without the correct adapter, mating these two components isn’t possible — this bushing solves that fitment gap directly and cleanly.
Key Benefits
For diesel owners running a FASS Drop-In Series fuel system, cold weather can be a real concern for fuel flow and filtration performance. Being able to add a heater probe kit gives you an extra layer of protection against the effects of cold temperatures on your fuel system, and the HB-2001 is the specific hardware required to get that kit properly connected to your Drop-In Series unit. It’s a small part, but it plays a critical role in completing the installation correctly and securely.
What’s Included
Each HB-2001 is sold as a single unit (sold as: Each), so you know exactly what you’re getting when you order — one adapter bushing, ready to install between your FASS Heater Probe kit and Drop-In Series fuel system.
Fitment
This adapter bushing is designed to fit Truck/SUV applications equipped with the FASS Drop-In Series Fuel System and is intended specifically for use with the FASS Heater Probe kit. Confirm that your fuel system is a FASS Drop-In Series unit before ordering to ensure proper compatibility.
- Genuine FASS Fuel Systems part, number HB-2001
- -8 ORB Male to 1/4 inch NPT Female thread configuration
- Enables use of the FASS Heater Probe kit with FASS Drop-In Series Fuel Systems
- Compact, purpose-built adapter bushing — no guesswork on fitment
- Sold individually (each)
- Fits Truck/SUV applications running a compatible FASS Drop-In Series system
If you’re upgrading your FASS Drop-In Series fuel system for cold-weather reliability, the HB-2001 adapter bushing is the missing link that gets your Heater Probe kit properly connected and functioning as intended.





