We may receive a commission on purchases made from links. Automakers strive to produce the highest-performing engines that meet their budget goals. That often means the performance gains from porting ...

Gasoline engines burn a mixture of fuel and air. In order to create horsepower, your engine must maintain a good quantity and velocity of air/fuel charge into the combustion chamber. Think of the ...

QUESTION: I was just informed the coolant leak in my GMC Yukon is due to a leaking intake manifold gasket. Apparently this is a common problem. I was shocked at the price quoted for the repair and am ...

There's no mistaking that Pontiac's cast-iron four-barrel is a solid performer. When it comes to cast-iron Pontiac cylinder heads, the Round-Ports are the fancy of every performance enthusiast, but ...