4.5″ Exhaust Decat Downpipe – BMW 4 Series F32 440i B58 16-19

• Manufactured from highest quality T304 grade stainless steel
• Mandrel bent and fully TIG welded for strength and durability
• Free flowing catalyst replacement to get the most from the B58 engine
• Designed to improve power and torque across the entire RPM range
• Sold for off road and track use only

4.5″ Exhaust Decat Downpipe compatible with BMW 4 Series F32 440i B58 16-19, replaces the restrictive catalyst with a free flowing pipe, improving power and torque across the RPM range. Our 4.5″ Exhaust Decat Downpipe is a great cost-effective way of releasing more power from your 440i.