the pural takes the horsepower out of these names in my opinion. The singluars look available. This is good news and bad news. The good news is there available to you if this is a topic you have passion/expertise in. The bad news is nobody wanted this name enough to pay regfee for it.
Possible use would be gas saving tricks/tuneup proceedures to ge as low as possible mpg on your 442 muscle car. Regfee value