4.5″ Exhaust Decat Downpipe – BMW 3 Series F30 340i B58 15-19

• 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

Our 4.5″ Exhaust Decat Downpipe compatible with BMW 3 Series 340i B58 15-19 is the perfect way to release more power from the B58 engine. With a more free flowing pipe than OEM, our 4.5″ Exhaust Decat Downpipe provides noticeably increased torque and throttle response.