BMW 125i F20 F21 B48 rear silencer bypass - Milltek non-valved with JET-90 carbon trims

Direct-fit rear silencer bypass for F20/F21 125i models with the B48 engine (2016+). Deletes the restrictive stock rear box, sharpening throttle response and delivering a louder, crisper exhaust note - no drone, no low-speed boom.

• Non-valved Milltek UK design: simple, reliable, track-day ready
• JET-90 carbon-fibre tips included - lightweight, corrosion-resistant, motorsport-styled
• Made from 304 stainless steel, mandrel-bent for flow and durability
• Fits using standard M135i valance - no extra parts or modifications needed
• Acoustically tuned in the UK for fast-road and weekend track use