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 ...

An intake manifold gasket or vacuum leak can quietly drain your engine’s power, fuel efficiency, and reliability. Recognizing early signs like rough idle, misfires, or coolant loss helps prevent ...

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 ...