This could lead to a free-for-all as tuners go forward, but judging by the DOJ's statement, they should hold on just a second ...

Many modern cars come equipped with turbochargers. that means it's critical to be able to identify a problem with your turbo ...

Matt stops by with his long-bed LMM Duramax that sounds like a jet taking off. We go over the truck, its setup, and the mods that make it insanely loud, then let it run so you can hear just how wild ...

A knocking sound from the engine often triggers worst-case assumptions, but piston slap is a far more common—and usually less dangerous—culprit. It occurs when a piston lightly contacts the cylinder ...