Rotary engines are not that environmentally friendly since they burn off oil injected to lubricate the apex seals. To curb this, Mazda set up two catalytic convertors during the RX-7 with the twin-turbocharged 13B-REW.Get just one using a Torsen LSD, and you’ll be fighting the urge to drift about every corner you're taking. It’s far more fun dr… Read More