Active Autowerke Active Aflow Catted Downpipes – BMW S58 G80/G82/G87 M2/M3/M4 11-085A

OVERVIEW

Performance downpipes for the BMW S58-powered G87 M2, G80 M3, and G82 M4. This version is equipped with a pair of 4.5" Active Aflow high-flow catalytic converters designed to run without a check engine light.

SPECS

• Durable construction from TIG welded 304 stainless steel with 1.5mm wall thickness
• 3 inch diameter piping to reduce exhaust restriction and improve turbo spool
• Tapers to 70mm (stock diameter) to connect to the OEM exhaust system
• Easily bolts on, no cutting or welding required

PARTS INCLUDED

• 1x downpipe set with Active Aflow catalytic converters

TECH RESOURCES

• The pair of 4.5" Active Aflow ultra-high-flow catalytic converters (400 cells per square inch) feature full 304 stainless steel construction with furnace-brazed substrate, are rated for up to 800hp applications, withstand temperatures up to 1500°F, and are EPA registered and OBD2 compliant for 1996-and-newer vehicles — designed to run without a catalytic-efficiency check engine light.
• Not legal for use on vehicles registered in California per California Vehicle Code Section 27156 and 38391 — meets EPA, not CARB, standards.
• Covered by a 5-year/50,000-mile warranty on shell and tube ends and a 2-year/25,000-mile warranty on the catalytic core to the original purchaser only.
• For the M3/M4 (G80/G82), pair with an Active Autowerke mid-pipe — Gen 2 Equal Length, Single, or Mid-Pipe with X-Pipe.
• Catalytic converter break-in procedure (PDF)

PART NUMBER

• 11-085A

VEHICLE APPLICATIONS