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Earls Exhaust Back Pressure Plumbing Kit


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This plumbing kit includes the components needed to install an exhaust back pressure sensor (the sensor is available separately - part number 554-102). This type of sensor is often used with data acquisition, or EFI systems to monitor the exhaust back pressure just prior to the turbo. The exhaust heat and engine vibration are tough on the sensor, so it is mounted remotely and isolated by the stainless hardline & flexible Speed-Flex hose assembly. This kit includes: weld bung, pre-made stainless hardline, Speed-Flex hose assembly, sensor mounting clamp, adapters & hardware.


  • Includes All Plumbing Components to Install Exhaust Back Pressure Sensor
  • Premade -4AN Stainless Steel Hardline w/ Tube Nuts & Tube Sleeves – 18” Long
  • Premade -4AN Speed-Flex Hose - 24” Long
  • Exhaust Weld Bung w/ 4 AN Male Flare
  • Adapter 1/8” NPT Female to -4 AN Male Flare (for Sensor)
  • Adapter -4 AN Male Union (Connects Hardline to Flexible Hose)
  • Cushion Clamp & Mounting Hardware - to Mount Sensor
  • Isolates Sensor from Engine Heat & Vibration - for Accurate Pressure Readings & Sensor Longevity
  • Use w/ Sensor 554-102 (available separately)


Emission Code4
Hose Size4 AN
MaterialStainless and Steel
Overall Length42"
Product TypeBack Pressure Plumbing Kit
Part NumberPK0001ERL

Service Parts



This part is legal for sale or use on Racing Use Only Vehicles

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

Tech Resources

Requires Welding for Installation.
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