Both Audi and BMW have long, storied histories of making powerful six-cylinder engines ... or standard exhaust and filter upgrades for less restriction. As turbo and superchargers both generate ...

In the March issue we tackled some common and not-so-common power adders for the S50 3.0 and S52 3.2 motors found in '95-99 BMW ... Z3 M Roadsters). We followed that in April with engine upgrades ...

The BMW Z3 M Coupe "Clown Shoe" fits ... but not from an engine swap. With some fiddling, the factory B58 six-cylinder turbo is more than capable of producing enough power to suit Cambell's ...