Lycoming O-320 Carb Heat Box with Tube

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Part# 05-01388
MFR Model# 100-320B


Lycoming O-320 Carb Heat Box. 1-1/8" diameter height - 1" smaller flange. Metal. Available with or without tube.

Note: Filter sold seperately. Use P/N: BA4106 for Filter Assembly.
California Prop 65 Warning Symbol

WARNING: The product may contain and/or expose you to a chemical(s) or substance(s) which are known to the State of California to cause cancer and/or birth defects or other reproductive harm.


  • Height: 2.35"
  • Width: 3.96"
  • Length: 5-3/16"
  • Height: 5.4"
  • Width: 5.19"
Ducting Flange
  • Length: 1"
  • Outside Diameter: 2"
Mounting Flange
  • Height from box: 1"
  • Inside Diamter: 2.38"
  • Diameter of mounting pad: 3"
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Four months and many emails just to end up returning this Item because filter was not available. CHB was not what was shown for Longez/Vari ez advertisement in catalog or Net. CHB was built well and probably would have worked but not without a filter which kept getting delayed.

Thomas N
December 21, 2019


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Which air filter does this Carb Heat Box use? I am looking to replace my carb heat box and it looks the same. My current box uses a Brackett BA4106 air filter.

Yes, this Carb Heat Box (part # 05-01388 + 05-06841) uses the same BA4106 air filter.

Q: Is this carb heat box FAA approved?

No, this part is not FAA PMA certified.

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