This slash cut tailpipe version of our M135i backbox delete adds a sporty look to the rear end of your 1 Series, making it an excellent performance and aesthetic upgrade.
Direnza Brushed Backbox Deletes are manufactured from T304 grade brushed steel, handcrafted by our specialist Direnza engineering team to ensure a safe and secure fit every time.
A direct replacement for the stock backbox, Direnza mandrel-bent exhaust components are fully TIG welded and feature CNC-machined flanges for strength and durability.
Engineered to not only improve power and torque across the entire RPM range but Direnza exhaust components improve throttle response to help you push further and faster on the road or the track.
