After viewers suggested a rebuilt Buick 350 engine was being choked by its stock cast iron intake manifold, machinists tested both the original and an aftermarket aluminum replacement on a flow bench.

Editor's Note: As inanimate as intake manifolds may appear, they provide a path to both major and minor on-track power gains. Selection is one thing; "tuning" them to specific applications is a blend ...

For many years the aftermarket intake manifold has been considered one of the first additions in any engine development program. It has been publicized, advertised, and assumed by many hot rodders ...