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Ships within 48 hours · Estimated delivery Nov 14 - Nov 19
ETA: Dec 5th 2025
Stock air filters are replaced with 77% larger Dinan conical air filters for optimum flow
0i Roadster (M54)
The boards come pre-mounted with high-performance thermal adhesive for easy and secure installation
These air boxes have been enlarged and equipped with massive filters to handle this increased volume and together with the rest of the system allow the intake to flow as efficiently as possible
MAD BMW S55 3.5" Fat Boy Downpipes M2C M3 M4 W/ Flex Section Silver Ceramic Coated?:Yes ETA: Dec 5th 2025We are proud to introduce the MAD S55 Fat Boy 3. 5" Downpipes. These are the largest BMW S55 M2 M3 M4 downpipes on the market. Upgrade from the stock S55 downpipes to the MAD 3. 5" S55 catless downpipes for maximum airflow, power, and sound! Upgrade to the MAD BMW 3. 5" S55 downpipes to eliminate the backpressure caused by your stock catalytic converters. By upgrading to our downpipes, your turbos can now spool faster and achieve maximum power. As a
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