BMW M240i Performance Exhaust – Dinan Freeflow Axleback – Black – ‘17–‘21. Purpose-built for the F22/F23 M240i, this axle-back improves flow and delivers a refined yet assertive soundtrack.

Engineered by Dinan to reduce back pressure, the system is crafted from 100% 16‑gauge 304 stainless steel for durability and factory-like fitment using OEM hangers. A tuned Helmholtz chamber tames low‑RPM drone while preserving the distinctive burbles and pops under load. Twin 89 mm (3.5") ceramic black, laser‑engraved tips complete the look. The factory computer‑controlled exhaust valve is removed. Dinan testing shows gains of +6 hp and +5 lb‑ft at 6600 rpm.

Features

• Fits 2017–2021 BMW M240i (F22/F23)
• Freeflow axle‑back design for reduced back pressure
• 100% 16‑gauge 304 stainless steel construction
• Helmholtz chamber to reduce drone
• Twin 89 mm (3.5") ceramic black tips, laser engraved
• Uses factory brackets and hangers
• Eliminates factory computer‑controlled exhaust valve
• Dinan‑tested gains: +6 hp and +5 lb‑ft @ 6600 rpm

Have questions or want guidance on your build? Call our Austin shop at 512-982-9393 or our Los Angeles, CA area shop at 562-981-6800. We offer installation and customization services at both locations. Considering multiple items? Contact us for potential shipping discounts. We install on premises at both locations.

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