the kenne bell i know doesnt, how ever it is dealer warranty safe. meaning they dealer can not void your powertrain warranty due to the super charger. As long as propperly installed and not being caused by race abuse of course.

But kennebell its self isnt the one who warranties your car. and any signs of abuse forget about it, your warranty is gone.

Saleen im pretty sure offers no warranty what so ever, not even on their parts. except for probably one of those 30 day type of things, if its broken during shipping, return it. other wise tuff crap.