The best way to appreciate the capabilities of the process is to examine the inside of an intake manifold runner before and after the modification. This view shows a stock runner in a TPI manifold ...

Narrator: I know what you're thinking. No, this is not one of those viral slime videos. You're looking at a process called extrude honing. But what exactly is it? Gary Kubo: Extrude honing is a ...

Talking about improving airflow is one thing, accomplishing it is something else. And as any head porter will tell you, looks can be deceiving. Ports and runners that look like they can flow as much ...

Engine porting has been around for as long as there has been electricity to power high speed grinders, but there are many options a racer or street buff can choose from when looking to improve the ...