How about the New Performance Tuners for the Challenger any used some and what happend. Here I have a little description about a Popular Tuner.

Description

Forget every other tuning gadget, gizmo or device. Now that Hypertech has released its much-awaited Hypertech Max Energy Programmer, there’s no reason to load any other programming into your power plant.

Sure, Hypertech has made great programming units before. But, with the Hypertech Max Energy Programmer, they did it even better. Stock diesel rigs gain up to 176hp; gas can gain up to 57hp. The expertly-mapped tuning for your vehicle offers all the ponies you need at any RPM, even when towing up to 10,000lbs. And, it keeps heat low without de-fueling that kills your momentum.

Beyond unruly power, the Hypertech Max Energy Programmer is packed with trick features. Most vehicles can correct your speedometer and odometer for tire swaps up to 54″ in size. You can even check and clear engine trouble codes. And, it’s packed with programming for premium or regular fuel to save you cash. Plus, there’s a Lifetime Warranty, too. Discover the feel of your ride on Max Energy now.

Features

* The Hypertech Max Energy Programmer unlocks every ounce of power in your vehicle
* Custom-tuned for your specific year, make, model and engine
* Fuels diesel rigs with up to 176hp beyond stock
* Packs up to 57hp extra into the pedal of gas-fueled rides
* Vehicles testing the Max Energy experienced gains of up to 1.5 to 6 MPG
* Expertly tuned across the power band for extra juice at any RPM
* Mapped to keep damaging temps low without de-fueling that kills power
* Engineered to thrill—even when towing up to 10,000lbs.
* Optimized transmission settings always have you in the right gear
* Corrects odometer and speedometer settings for up to 54″ tires
* Raises the top speed limiter and rev limiter of many vehicles
* Reads and clears trouble codes
* Loaded with programming for regular or premium fuel for most vehicles
* Equipped with a USB connector and cable for quick updates and new tunes
* Simple controls and prompts - only 4 buttons to push
* Installs programming in as little as 10 minutes
* Download Installation Instructions (Adobe Acrobat required)
* Your Hypertech Max Energy Power Programmer is covered by Lifetime Warranty