Active Autowerke Downpipe Exhaust Upgrade - A90/ A91 Supra (B58)

Unleash the full potential of your Toyota GR Supra A90 / A91 with the Active Autowerke B58 Downpipe Upgrade — precision-engineered to maximize exhaust flow, reduce turbo lag, and deliver a deeper, more aggressive tone. Born from decades of performance innovation, this downpipe replaces the restrictive factory unit with a 4.5-inch mandrel-bent stainless steel design that dramatically improves turbo efficiency and power delivery. By optimizing exhaust gas evacuation, spool times are shortened and overall engine response becomes sharper and more immediate. Each system features a cast stainless upper V-band flange for OEM-grade precision fitment, a TIG-welded 304 stainless construction for long-term durability, and a flex joint section that tapers seamlessly from 4.5” to 3.5” before matching the OEM 80mm exhaust connection. This ensures maximum flow without reducing below stock diameter. Manufactured in Miami, Florida, the Active Autowerke downpipe represents the ideal combination of craft