BMW G20 M340i G21 M340i G42 M240i G29 Z4 A90 Supra B58 Decat Downpipe Milltek Sport

Direct-fit decat downpipe for B58 engines with factory OPF/GPF: BMW M240i (G42), M340i (G20/G21), Z4 (G29) and Toyota Supra (A90). No fabrication, no cutting - bolts straight on.

• Full 3-inch mandrel-bent 304 stainless steel, TIG welded in the UK
• Enables real Stage 2 gains when paired with an ECU remap - sharper throttle response, faster spool, measurable power increase
• Compatible with OE exhausts and Milltek cat-back systems
• Corrosion-resistant, lightweight, and covered by Milltek’s lifetime warranty (excl. cats & flexis)