These modern tuning devices offer improved power and fuel economy, just like the performance chips of the 1980s and 1990s, but the modern tools do much more than that.

In stock form, a 2022 BMW M3 Competition xDrive comes with 503 horsepower (510 metric horsepower) and 650 Nm (479 lb.-ft) of torque. Its eight-speed automatic allows it to have a top speed of 290 ...