We may receive a commission on purchases made from links. An engine relies heavily on air to make the combustion process work properly. The exhaust manifold, which is attached to the engine block, ...

In most tests on engines up to 6,500 rpm, a modern high-rise dual-plane intake like this Chevrolet Performance example on a Chevy 350 generates the best overall average torque and power numbers ...

Since the days of relieving flathead Fords, we've known about the advantage of porting. Grind those critical passages with the right touch, and airflow through the engine improves-and with more air ...