The Precision Raceworks BMW Secondary Pump Activation Harness (Previously -Boost Referenced Pump Activation Harness) is the preferred method to control auxiliary fuel pumps by pump manufacturers and tuners alike.

This kit is considered the most complete and highest quality kit on the market and is sold private label to many BMW pump manufacturers.   That is why this harness is the #1 method of secondary pump control on the market around the globe.

Product Features:

• 10 Gauge Oxygen Free Copper Wire
• 100% Plug & Play (zero cutting, stripping, crimping when used with included pressure switch)
• Pre-set 13psi boost reference switch designed for automotive use

New Features:

• Optional Negative Trigger or Positive Trigger harnesses included
• Test Plug included

Each kit includes a boost referenced pressure switch often referred to as a "hobbs switch" however our pressure switch is designed for exposure to oil as well as air and is safe for engine bay temperatures for years of reliable service unlike a "hobbs switch" which is designed for use in swimming pool and hot tub applications.

Vehicle Fitment:

• BMW M2 2016 to 2018
• BMW M3 2015 to 2018
• BMW M4 2015 to 2020

Installation Process:

Download PDF Installation Instructions HERE