BMW N63/N63TU 3" Catted Downpipes

30 Day Money-Back Guarantee | IN STOCK HIGHLIGHTS • Gain up to +43whp / 48wtq• Improved Turbo Spool• Aggressive Exhaust Note• 200 Cell Sport Catalysts• Direct Bolt-On, Fully Reversible   PROFILE ARM Motorsports new N63/N63TU Catted Downpipes for the 4.4L V8 Twin-Turbo powered 550i allows you to take your N63/N63TU engine to the next level. Designed with the same precision as our N63 Catless Downpipes, the ARM N63 Catted Downpipes feature high-flow 200 cell ceramic sport catalytic converters positioned in the OEM location.  Made with full 304 Stainless Steel and 3" construction these downpipes provide a significant increase in power and torque over the OEM catted downpipes. In addition to the massive power gains, these downpipes open up an incredible exhaust sound from the turbocharged V8!  By replacing the OEM downpipes with the ARM N63 Catted Downpipes, you'll be removing the restriction from the OEM converters.  This will reduce exhaust back-pressure and al