We used to have all kinds of fun stuff when liability wasn't such a big thing.
Studebaker built a very limited number of Avanti's with an R-4 option. One Paxton blower blowing into the inlet of a second one. The result was 35 PSI boost off the showroom floor.
The warranty on the engine officially expired when the starter teeth engaged the flywheel teeth.
The motor was likely to grenade at any time and they sold all the cared to make. If the motor lasted long enough the exploding clutch pieces would pass thru the passenger compartment sooner or later.
All of the manufacturers had wild things like that at one time or another and we just drove the hell out of them. When they got boring we would crank them up a couple of notches and go some more.
Die? who me?