Exhaust Decat Downpipe – BMW 4 Series F32 F33 F36 420i 430i B48 15-19

Gravity Performance decats instantly increase power by allowing exhaust gasses to exit the vehicle quicker. Our decats are designed to be direct replacements for the OEM catalytic converter, ensuring smooth installation every time. 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 B48 engine Designed to improve power and torque across the entire RPM range   Decibel Readings: Stock Valves Closed: 67.2 Stock Valves Open: 66.1 Decat Valves Closed: 69.6 Decat Valves Open: 71.2