2003 BMW Z4 By Rich’s

03 BMW Z4 Roadster ..We installed our exclusive small case street demon mufflers in the center section of the exhaust from there it goes into an expansion x chamber to equalize the exhaust pulses. To the rear, we installed our 3-inch stainless tips in a staggered pattern to follow the curve of the rear bumper. This system will produce 10-12 hp with 1 mpg gain, with no drone inside!