This is hands-down one of the top tuners available for 2003–2007 5.9L Cummins trucks. Nearly every test drive with a Smarty Junior tuner ends with the truck owner making a purchase—it's that impressive. While it doesn’t offer as many power levels as the Smarty Senior, the Junior model is ideal for everyday drivers who might add upgrades like a cold air intake or aftermarket exhaust. It’s user-friendly, delivers noticeable power gains, and can even improve fuel economy once the initial excitement fades.
Designed for those who want dependable, safe performance, the Smarty Junior balances added horsepower with engine and transmission protection. Its software was developed with an emphasis on reducing exhaust gas temperatures (EGTs) and minimizing smoke output—even at its highest performance setting.
Smarty - J-06 - Features
CaTCHER software's inside
Not traceable in the stock setting. Smarty leaves no footprint
Three different performance levels: 40 / 70 / 100 hp
Cold weather 3 Cylinder High Idle is enabled in all software
Improved fuel economy
Reads Diagnostic Trouble Codes in plain text
Optimized drivability
No tools required, no fuses to pull
Fastest download in the industry, up to three times faster than
USB built in for simple updates from internet
the competition, a typical ECM update takes about 3.5 to 5
Easy installation
minutes, depending on the truck model
Reliable, it works off your OEM hardware
ABS tire height updates in just few seconds from 22,5" to 44"
