Active Autowerke Catted Downpipe- BMW B58 Fits F/G Chassis Up to 2024

OVERVIEW

The Active Autowerke B58 Signature downpipe utilizes 4.5" diameter stainless steel piping to provide more power, quicker spool, and extreme durability. It then tapers down to 3.5" where a stainless flex joint is incorporated, then down to 80mm to meet the OEM exhaust system — the diameter is never dropped below the stock 80mm.

SPECS

• Casted upper stainless steel V-Band for precise fitment
• 4.50" diameter piping allows for maximum power output
• Quicker turbo spool
• Durable construction from TIG welded 304 stainless steel
• Easily bolts on, no cutting or welding required
• Made in Miami, Florida

PARTS INCLUDED

• 1x downpipe (catless or catted per selected variant)

TECH RESOURCES

• The catted variant includes a 4.5" Active Aflow catalytic converter (full 304 stainless steel construction, including the substrate) rated for engines up to 800hp, EPA registered and OBD2 compliant for 1996-and-newer vehicles.
• Not legal for use on vehicles registered in California per California Vehicle Code Section 27156 and 38391 — meets EPA (not CARB) emissions 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; warranty is void if the vehicle has excessive burble (greater than stock), as this physically destroys the catalytic core.
• No performance tune is required to run this downpipe (per Active Autowerke).
• For M340i/M440i, pair with the Active Autowerke B58 Charge Pipe; for the 340i/440i (F3x), add the Valved Rear Exhaust.
• Catalytic converter break-in procedure — Active Cats / GESI catted variants (PDF)

PART NUMBER

• 11-061 (Catless)
• 11-062A (Active Cats)
• 11-062 (Gesi Cats)

VEHICLE APPLICATIONS

Note: this listing's title references "Supra," but no Toyota Supra fitment is confirmed on Active Autowerke's product page for this specific part — fitment above is BMW F/G-chassis only. If you have a source confirming Supra compatibility for this exact part, let us know and we'll add it.