Stock Tune: with adjustable speed limiters. Speed limiter to approximately 120 MPH varies based on vehicle set-up weight, tire size, 2wd vs. 4wd, etc. 40 RWHP and 100-ft/lb TQ - Tow Tune, made specifically for towing. DiabloSport recommended weight limitations based on manufacturer suggested limits for the vehicle. 65 RWHP and 140-ft/lb TQ - Economy Performance Tune, designed for Economy and Performance, fuel economy depends solely on driving style, and will vary from vehicle to vehicle. DiabloSport recommended weight limitations of 8,000 Lbs. 85 RWHP and 170-ft/lb TQ - Performance Tune, designed specifically for performance street driving. DiabloSport recommends this tune not be used for towing. 120 RWHP and 250-ft/lb TQ - XPerformance Tune, designed specifically for opening a can of whoop-*** (pardon the expression). DiabloSport recommends this tune not be used for towing.
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