Car geeks are always looking for a good DIY project for the weekend, and most of us will do just about anything to free up additional ponies. Case inpoint: Gasket-match-porting your manifold is one of ...

OBJECTIVE: Wet flow, pressure excursions, port volume, runner length, plenum volume—all these figure into an engine's overall efficiency. But there's more… Sometimes theory is neat, but sometimes it ...

The intake manifold distributes air or air/fuel mixtures to the individual cylinders under varying engine speeds, loads, and environmental conditions. Whether the working flow is pure air, air/fuel, ...