PROFILE

The ARM 6" B58 Catted Downpipe isperfect if you're looking for all of the performance of aCatless B58 Downpipewithout the odor associated with increased emissions. Our B58 Catted Downpipe design incorporates a 6" high-flow 200 cell ceramic catalytic converter, making it a standout choice for those seeking power without while reducing emissions. The increased volume and improved turbo spool thatfrom the catless variationsare still present in our 6" B58 Catted Downpipe.

The ARM 6" Catted B58 Downpipe replaces the restrictive factory downpipe with a 200 cell catalyst with a 6" diameter that significantly improves exhaust flow. This upgrade unlocks additional power and torque while reducing emissions compared to a full catless B58 downpipe, allowing you to safely run Stage 2+ tunes andenjoy a more vibrant soundfrom your B58-poweredBMW.

ENHANCE THE SOUND OF YOUR B58

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• Fitments

This part fits the following vehicles

HIGHLIGHTS6"200 Cell High-Flow Catalyst Improved Exhaust SoundFaster Turbo Spool Stage 2+ Tune CompatibilityPROFILEThe ARM 6" B58 Catted Downpipe isperfect if you're looking for all of the performance of aCatless B58 Downpipewithout the odor associated with increased emissions. Our B58 Catted Downpipe design incorporates a 6" high-flow 200 cell ceramic catalytic converter, making it a standout choice for those seeking power without while reducing emissions. The increased volume and improved turbo spool thatfrom the catless variationsare still present in our 6" B58 Catted Downpipe.The ARM 6" Catted B58 Downpipe replaces the restrictive factory downpipe with a 200 cell catalyst with a 6" diameter that significantly improves exhaust flow. This upgrade unlocks additional power and torque while reducing emissions compared to a full catless B58 downpipe, allowing you to safely run Stage 2+ tunes andenjoy a more vibrant soundfrom your B58-poweredBMW.ENHANCE THE SOUND OF YOUR B58The ARM 6" B58 Catted Downpipe amplifies the overall volume of your B58's exhaust, bringing out the burbles and enhancing the audible presence of the turbo spool, even on the OEM tune. Below is a sound clip of theARM 6" Catless Downpipe, paired with ourB58 MidpipeandSingle Exit Exhaust.CONSTRUCTIONThe ARM 6" B58 Catted Downpipe starts with a 4.5" diameterprecision CNC machined turbo V-band flange whichmatches up perfectly to the OEM turbo or upgraded turbo with an OEM flange. It then rapidly transitions to the6" OD high-flow catted section.The ARM 6" B58 Catted Downpipe features two O2 sensor bungs to allow for reinstallation of the OEM oxygen sensors.The pre-catalyst O2 sensor bung is locatedcloser to the turbo on the ARM 6" B58 Downpipe to avoid stretching the O2 sensor wiresduring installation. The post-catalyst O2 sensor bung comes with abuilt-in extensionto allow the sensor to reach around the 6" section of the downpipe.TheARM 6" B58 Downpipe then reduces tothe OEMsize to allow it toconnect to the OEM midpipe or theARM B58 Midpipe Upgrade. The flex section is incorporated into the ARM 6" B58 Downpipe to relieve stress on the turbo during aggressive driving.The ARM 6" B58 Downpipe is further secured by the2-bolt bracketwhich utilizes the OEM downpipe mounting points.IN THE BOX ARM 6" B58 DownpipeHIGHLIGHTS 6"200 Cell High-Flow Catalyst Improved Exhaust SoundFaster Turbo Spool Stage 2+ Tune Compatibility PROFILE The ARM 6" B58 Catted Downpipe isperfect if you're looking for all of the performance of aCatless B58 Downpipewithout the odor associated with increased emissions. Our B58 Catted Downpipe