Optimum exhaust flow is critical to maximizing the efficiency of any engine. After all, an engine is just a sophisticated air pump – and the easier it is to move air in and out, the more efficient the ...

As much as we like the 5.9L Cummins powerplant, the stock exhaust manifold is constrictive and contorted, interfering with the flow of gases to the turbo and downpipe. That, in turn, can produce the ...

Does your performance car sound like a UPS truck? The exhaust is the first upgrade for an improved soundtrack -- and more power. Something is missing in your life. And it's probably not a heavier ...

We install Supersprint RHD manifolds and exhaust on our BMW E36 M3 and take it to the dyno to see the performance gains. How much power does this upgrade add? Watch the full install and testing ...