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Holley 100 GPH HP In-line Fuel Pump 12-890

SKU: 12-890

Availability: In stock

Handling Time: 30 Days


100 GPH HP In-line Fuel Pump

Carb or EFI Applications
Supports up to 900 EFI or 1050 Carb HP
Compatible with Pump Gas*, Race gas, Diesel or E85

Holley's HP In-Line Billet Fuel Pumps are designed to be the perfect companion to your carbureted or fuel injected race car, off-road truck or any engine needing fuel! The HP fuel pumps feature OEM gerotor technology which yields lightweight, quiet operation and 100,000+ mile durability in a cost effective, attractive package. HP fuel pumps are Race gas, E-85 and diesel compatible and can be used in racing applications with 18.5 volt charging systems up to 80 psi.


  • Billet aluminum construction for durability & good looks
  • -8 an o-ring inlet/outlet for high flow and superior sealing
  • Excellent for use with carbureted or EFI applications
  • Fully submersible in-tank for custom applications, space savings and less plumbing
  • Compatible with 12v to 18.5v systems for street or race use
  • Compact (7.5" long x 3" wide x 2.75" tall) for easy installation on frame rails or other tight areas
  • Proven durability beyond 3,000 hours in gasoline or diesel fuels
  • Weighs only 3.1 lbs.
  • Current draw at 43 psi and 13.5 vdc is 8.6 amps
  • Not designed for use on aircraft of any type.

Installation Note:

*Pump gas compatible for intermittent or under 90 degree ambient temperature use

Pump gas use recommendations:

This pump is compatible with pump gas, but is not recommended for street driven vehicles where the ambient temperature is regularly above 90 degrees

For street driven vehicles in high temps with pump gas, Holley recommends part numbers 12-600 or 12-800 for optimum hot fuel handling

Proper fuel system engineering is critical for maximum performance. Please see Holley Fuel System Chart for information about proper installation of your fuel system.

Will work with E-85 and Diesel!

These pumps do not have an internal bypass. A bypass style regulator and return line are required.


This pump is not designed to use a standard conical seat style union in the inlet or outlet of the pump. Example: Part # AT981508ERL. Use of this style fitting will block flow and WILL lead to poor performance and pump failure. The ONLY correct fitting to use is a contoured port fitting with an O-ring seal such as :Part # AT985008ERL.


  • Application: Universal
  • Brand: Holley
  • Emission Code: 5
  • Forced Induction HP@43PSI: 700
  • Forced Induction HP@60PSI: 600
  • Forced Induction HP@8PSI: 800
  • Free Flow GPH: 105
  • Fuel System: Carbureted
  • Fuel System: EFI
  • Fuel Type: Diesel
  • Fuel Type: E85
  • Fuel Type: Gasoline
  • GPH@43PSI: 76
  • GPH@60PSI: 70
  • GPH@8PSI: 100
  • Inlet Size: 8 AN O-Ring - 3/4-16 SAE
  • LPH@43PSI: 287
  • LPH@60PSI: 265
  • LPH@8PSI: 363
  • Material: Aluminum
  • Naturally Aspirated HP@43PSI: 900
  • Naturally Aspirated HP@60PSI: 800
  • Naturally Aspirated HP@8PSI: 1050
  • Outlet Size: 8 AN O-Ring - 3/4-16 SAE
  • Product Type: Fuel Pump
  • Pump Body Color: Black Anodized
  • Warning: California Proposition 65
  • Warranty: Limited 90 Day