Originally Posted by seymore4

The Osiris license is just software code, Like Microsoft windows. When you buy direct from uprev it comes on a USB-obd2 cable that allows you to flash the ecu. It also has cipher, a very useful diagnostic utility that lets you check and Clear codes, monitor and datalog engine parameters, etc. Since you have the cable you can reflash your ecu back to stock at any time and use the Osiris license on another vehicle or sell it used. When you buy it direct from uprev it's $500 but you get free email updates to the tune, if you're planning on getting a dyno tune you won't need those so just the license and cable is what you need.

If you get flashed at the shop they just load a license and tune onto your ecu, you pay full price for the license but dont get the cable. According to uprev's website the Osiris license is $300, so the dyno tune should be $300 cheaper if you already have the license on your ecu.

Shops make more profit if they flash you, but
It's a way better deal for you to buy it separately.