Exhaust Decat Downpipes - BMW 3 Series F80 M3 / 4 Series F82 M4 14+

Manufactured from highest quality T304 grade stainless steel
Mandrel bent and fully TIG welded for strength and durability
Free flowing Catalyst replacements to get the most from the 3.0L twin turbo S55 engine
Replacing the Secondary Catalytic converters
Sold for off road and track use only