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Sniper EFI MAP Sensor 2.5-bar

2.5-bar MAP sensor for Sniper EFI Fabricated Intake Manifolds with MAP sensor provision

PART# 870021

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The pressure inside the intake manifold is an extremely important input to the ECU. This sensor will respond to changes in manifold pressures and relay the information to the ECU in the form of a voltage signal ranging from 1-5 volts. This sensor will handle applications up to 25 lbs. of boost. Part # 558-416 will be required when using a Holley EFI system.


  • Utilizes Stock attaching points
  • Ideal for applications up to 25lbs of boost
  • This sensor monitors manifold vacuum, varying output voltage to the ECU as a function of load placed on the engine, providing necessary data to control fuel enrichment


BrandHolley Sniper EFI
Emission Code2
Product TypeMAP Sensor
Part Number870021

Service Parts



This part is legal for sale and use on Emissions Controlled Vehicles when used in accordance with the manufacturers application guide because it is a direct or consolidated replacement part.

The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle

Tech Resources

This MAP sensor is a direct replacement for GM # 12592525 sensor
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