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Holley

HOLLEY MAP Sensor 2.5 Bar GM LS

MPN: 870021 Catalog #: 001510147 Category: Map Sensors Check Vehicle Fitment

Product Details

Map Sensor - 2.5 bar - Up to 25 psi Boost - Sniper EFI Intake - GM LS-Series - Each

Sniper EFI MAP Sensor; 2.5 Bar; Applications Up to 25 lbs. Boost;

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.

DETAILS:

Part Number 870021 SPECS:

DETAILS:

  • Holley Performance Emission Code 3: This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles. The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles: 1965 and older U.S. manufactured California Certified vehicles/1967 and older U.S. manufactured Federally Certified vehicles/1967 and older Foreign manufactured vehicle. The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition and 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. 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
  • Manifold Absolute Pressure Sensor
  • Sniper EFI MAP Sensor
  • Ideal For Applications Up To 25lbs Of Boost
  • This Sensor Monitors Manifold Vacuum Varying Output Voltage To The ECU
  • Utilizes Stock Attaching Points
  • MAP SENSOR; 2.5 BAR FOR GM LS
  • MAP Sensor

Part Number 870021 SPECS:

  • WARNING CA Proposition 65: No

Vehicle Fitment

Universal or product-specific fitment. Please review the product details and contact us if you need help confirming fitment before ordering.

Engine Compatibility

GM - LSMatched variant: LS

GM Gen III/IV V8; LS1/LS2/LS3/LS6/LS7/LS9/LSA/LSX

Fitment note: Engine compatibility is provided as a guide. Please verify all fitment details before ordering.

Product Specs

Brand
Holley
Part Number
870021
Catalog Number
001510147
Product Line
Map Sensors
Category
Fuel Delivery
Type
Map Sensors
UPC / Barcode
090127064733
Length
2.60 in
Width
2.45 in
Height
1.20 in
Weight
0.04 lb
Ship Alone
No
Air Restricted
No

Shipping & Availability

Current status 12 Available - Ready to ship
Estimated timing Usually ships within 24hrs

This item is showing available inventory. Most in-stock performance parts ship quickly, but timing can vary by warehouse, vendor cut-off time, holidays, and carrier pickup.

Inventory shown: 12 available as of 6/4/2026.

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