Four vehicle fleets, consisting of 3 to 4 vehicles each, were emission tested on a 48" roll chassis dynamometer using both the FTP urban dynamometer driving cycle and the REP05 driving cycle. The ...

It's a story as old as hot rodding itself. It starts with the sales pitch-"Buy my widget and your engine will gain 50 hp"-and ends with a disappointed customer with a car that sure doesn't feel like ...