Active Autowerke Signature GESI Catted Downpipe – BMW B58 F/G Chassis Up to 2024 11-062

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. This version is equipped with a 4.5" GESI ultra-high-flow catalytic converter.

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 with GESI catalytic converter (turbo flange gasket pre-installed)

TECH RESOURCES

• The 4.5" GESI ultra-high-flow catalytic converter (400 cells per square inch) is rated for 500–850hp applications, withstands temperatures up to 1500°F, and is 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 (PDF)

PART NUMBER

• 11-062

VEHICLE APPLICATIONS