Probably the best BMW tuner in the US, Dinan Engineering, is currently working on making their offering more diverse, launching new parts almost on a weekly basis. Today they just announced that a new ...

1.) Dinan BMW F85 X5M/F86 X6M Free Flow Exhaust System Dinan is hot to turn SUV performance tuning into a thing, especially when it comes to the 4.4L S63B44 twin-turbo V-8 that serves as the beating ...

Gale Banks' new high-flow F-body exhaust system is a complete kit designed to replace every component of your existing exhaust system except the catalytic converter and the stock exhaust manifolds. As ...

Tecumseh Racing's Jerry Romanick makes adjustments to their small-block MoPar test mule, while Thrush's Peter Roberts digs through the mounds of mufflers gathered for these evaluations. Traditionally, ...