Active Autowerke Catted Downpipe with Active Cat B58 BMW/Toyota

Active Autowerke BMW B58 Catted Downpipe - now includes turbo flange gasket

BMW introduced a new valvetronic, single turbo version of its direct-injection engine for the later F-Chassis models beginning in 2016 and carried over to the G-chassis models. The Active Autowerke B58 downpipe for the M340i and M440i helps unleash some of the potential that is restricted by the OEM downpipe.

Turbochargers are powered by spent exhaust gases created during the combustion process. The quicker these gases are evacuated, the better. Unfortunately, the factory down pipe in the B58 is quite restrictive, which results in slower exhaust gases and slower turbo spool.

The Active Autowerke F-Chassis B58 Signature down pipe utilizes 4.5 diameter stainless steel piping in order to provide more power, quicker spool, and extreme durability. It then tapers down to 3.5" where we've incorporated a stainless flex joint and then down to 80mm to meet the OEM exhaust system. We never drop the diameter less than the stock diameter of 80mm.

This variant includes a 4.5" high flow Active catalytic converter that will NOT produce a CEL!

Features:

• NO CEL for catalytic efficiency when using this downpipe
• Casted upper stainless steel V-Band for precise fitment
• 4.50" diameter piping allows for maximum power output
• Quicker turbo spool
• Rated for 500 to 850 hp applications
• Withstands up to 1500 F
• Can reach operational efficiency within 9 seconds of startup
• Easily bolts-on no cutting or welding required
• Durable construction from TIG welded 304 stainless steel
• Precise fitment
• Ultra high flow 400 cell per square inch catalyst
• 304 stainless steel substrate is furnace braised to the mantle for outstanding durability
• Ideal for Forced Induction Applications with no loss of HP
• Both passengers and drivers are safe from harmful emissions and noise
• Covered by 5 Year / 50,000 Mile Warranty (on shell and tube ends) and 2 year / 25,000 Mile Warranty on the Catalytic core
• Made in Miami, Florida

Fitment:

Fits RWD and AWD

• 2016–2021 BMW 240/M240 F22/F23
• 2022+ BMW M240i G42
• 2016-2019 BMW 340i F30/F31/F34
• 2016-2019 BMW 440i F32/F33/F36
• 2020+ BMW M340i G20/G21
• 2016+ BMW 440i G22/G23/G26
• 2016-2024 BMW 540i G30/G31
• 2017-2023 BMW 640i G32
• 2016-2024 BMW 740i G11/G12
• 2018+ BMW 840i G14/G15/G16
• 2017+ BMW X3 M40 G01
• 2017+ BMW X4 M40 G02
• 2017+ BMW X5 M40 G05
• 2017+ BMW X6 M40 G06
• 2017+ BMW X7 M40 G07
  
• 2019+ BMW Z3 40 G29
• 2019+ Toyota Supra 3.0L A90/A91