Active Autowerke Catless Downpipes – BMW S58 F97/F98 X3M/X4M

OVERVIEW

Active Autowerke offers a performance downpipe upgrade specifically engineered for the BMW S58 engine in the F97/F98 X3M and X4M models. This is the catless version — part of the Motorsport Collection, designed for race and off-road use only.

SPECS

• Constructed from TIG welded 304 stainless steel with 1.5mm wall thickness for durability
• Features 3 inch diameter piping to reduce exhaust restriction and improve turbo spool
• Includes stainless flex joints, maintaining a minimum 70mm diameter to match OEM exhaust
• Precision fitment with bolt-on installation
• Manufactured in Miami, Florida

PARTS INCLUDED

• 1x catless downpipe set

TECH RESOURCES

• Off-road / competition use only — the catless downpipes remove the catalytic converters and are not emissions compliant for street use.
• A performance tune is typically required when running catless to address the catalyst efficiency monitors and avoid a check engine light.
• Covered by a 5-year/50,000-mile warranty on shell and tube ends to the original purchaser only.
• Minimizes back pressure on the turbochargers using a straightforward design with minimal bends, enhancing turbo spool speed and overall power potential.
• Completes the Active Autowerke X3M/X4M exhaust system — pair with a mid-pipe (Single or Equal Length) and the Valved Rear Axle-Back Exhaust.
• This catless version no longer appears in Active Autowerke's current online catalog — contact us to confirm availability before ordering.

VEHICLE APPLICATIONS