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Holley Performance Commander 950 Race Software Upgrade 534-191


Mapping And Set Up - ECU Firmware Upgrade

Pricing: $136.95


Holley Performance - Commander 950 Race Software Upgrade P/N 534-191 Features:

  • Internal Data-Logger
  • Programmable Load Scale
  • Programmable Inputs And Outputs
  • Programmable Target O2 Voltage
  • Programmable O2 Compensation Limits
  • Wideband O2 Integration
  • Deceleration Fuel Cutoff
  • Timing Trim Vs. Coolant Temperature

Product Documents:


Holley products have been the undisputed leader in fuel systems for over 100 years. Holley carburetors power every NASCAR Sprint Cup team and every NHRA Pro–Stock champion. Holley's products include performance fuel pumps, fuel injection, intake manifolds, cylinder heads & engine dress–up products for street performance, race and marine applications. As a single solution, or partnered with products from other Holley companies, Hooker Headers, Flowtech Headers, NOS, Weiand, or Earl's, Holley products can give you the edge you need over the competition.


  • 534-191
  • 534-191
  • 090127600634
  • Holley Performance
  • New

Shipping Information

  • Item Requires Shipping
  • 1.0 lbs.
  • W12.0000” x H3.0000” x L12.0000”

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