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     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.