UltraPower GM / Workhorse 7.4L Vortec (454) Custom Tuning

Out of Stock UltraPower GM / Workhorse 7.4L Vortec (454) Custom Tuning


Order Shipment Notice: 

Most orders are shipped within 24 hours from the order date. Orders placed on the weekend or after cutoff on Friday, and orders placed on select holidays are processed on the next business day. Please see our shipping terms for more information.

Part# UP74

If you will be sending us your ECM for reprogram you will need to select "Remove Core Charge"

UltraPower Custom Tuning


  • GM/Workhorse P32 w/ 7.4L Vortec Engine (L29)
  • GM Trucks with 7.4L Vortec Engine (L29)
  • Chevrolet & Workhorse Motor Home Chassis from 1996-2000 (L29)


  • Gains of 30-35 HP and 35-40 lb-ft torque on 1996-1997 model years
  • Gains of 40-45 HP and 45-50 lb-ft torque on 1998-2000 model years
  • Gains of 1/2 - 2 MPG
  • Downshifts less approaching hills
  • Disabling of emissions systems (for competition or off road use only)
  • Custom tuned for modifications such as aftermarket camshafts, exhaust, air intake, tire size, gear ratio, etc.

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 The state of California requires that this warning be posted for people purchasing products that reside in California.

WARNING: Products may contain one or more chemicals known in the State of California to cause cancer and/or birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov

Not Legal for California Use

  • Views: 56434
  • Product Code: UP74
  • Availability: Out of Stock
  • $668.25
  • $495.00
  • Control Module Core Charge $100.00
  • Remove Core Charge

Available Options