Part of the Settlement with the EPA and Harley was all about Harley selling their own tuners to defeat the EPA tunes that people hated. So on newer Harley's Dealers are supposed to reject any warranty claim if the bikes's intake, fuel, and or exhaust has been modified. The Dealers.............. Many Harley dealers know that aftermarket fuel, exhaust and intake are big things people like to modify, so they look the other way and get warranty approved.
The only time they would look at the ECU is if there was an Engine Issue.
Polaris/Indian use off the Shelf Bosch ECU units and the software is not proprietary, in fact Dynojet has a ECU flash module (PVCX) that can copy and save your current ECU file and let you upload new flash files just like Ivan does. The product also has an advanced software package where users and tuners like Ivan can go in and adjust everything. And again many of the dealers are big proponents of upgrades like this, so unless you blow an engine and Polaris actually has to investigate, the dealers will honor your warranty.
As for the EPA, last January they were going to ban ALL Aftermarket Intake, Exhaust or performance items on ALL Vehicles regardless or not if they were really going to be used for racing. Basically if the vehicle came out of the factory as a street vehicle, it couldn't be modified. This would put hundreds of companies out of business. These companies called their congressmen, and the EPA was told to shove it, and they dropped that rule change.
You have noticed however that all the aftermarket products now really highlight for Offroad and racing only.
2013 V Star 1300 Tourer
2018 Indian Chief Limited