Introducing the Superchips Flashcal F5 for 2007-2018 JK Wrangler PN. 3571 We've done our homework and have loaded the Flashcal with the most sought-after options for your JK. Take full advantage of the most popular aftermarket upgrades your late model JK craves. If you've added tires or gears to your Jeep, Flashcal is a must! KEY PRODUCT FEATURES: Corrects speedometer for tire upgrades between 26- 42 Speedometer recalibration for gear /axle swaps up to 5.38 Locking axle options with transfer case in 4-Hi & 4-Low (Rubicon only) Engine idle adjustability for winching Daytime running light options One touch lane change TPMS On/Off Accessory delay options (2011-18 models only - Includes adjustable delay for radios, accessory lights, and other aftermarket accessories tied to the same fuse) Headlamp delay options (2011-18 models only) Horn chirp and exterior lighting flash options when locking doors with keyless entry Reads and clears diagnostic trouble codes Internet updatable.