Active Autowerke Single Mid Pipe with F-Brace - F8X M3 / M4For over four decades, Active Autowerke has led the BMW performance industry with precision engineered exhaust systems designed to unleash power and refine sound. The F8X Single Mid Pipe with F Brace continues this legacy combining performance, tone, and craftsmanship in one powerful upgrade for your F80 M3 or F82 F83 M4. The factory mid pipe restricts exhaust flow and contributes to the high pitched weed eater tone often associated with the S55