TURBO MANIFOLD BASICS
Most of us have a fair idea of what a turbo manifold does, but we’ll mention it again for the newbies who are still learning. A turbo manifold is a series of runners, or pipes, that collect exiting exhaust gases which can then be channelled into a merge collector. A flange is needed to bolt the turbo to the manifold, and this is welded/cast to the merge collector. There are four key components which can make or break an exhaust manifold: runner volume and size, collector angle towards turbo flange, runner length, and wastegate placement.