Active Autowerke Downpipes w/ Active Cat BMW X3M/X4M F97/F98 S58

Active Autowerke BMW X3M S58 Downpipes

BMW introduced a new valvetronic, single turbo version of its direct-injection engine for the later F-Chassis models beginning in 2016 and continues into the G-Chassis models - the evolution to the S58 engine continues with the twin turbo variant used in the M-series vehicles. The Active Autowerke S58 downpipes for the X3M and X4M helps unleash some of the potential that is restricted by the OEM downpipes.

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 S58 is a bit restrictive, which results in slower exhaust gases and slower turbo spool.

The Active Autowerke X3M/X4M S58 Signature down pipe utilizes 3 inch diameter stainless steel piping in order to provide more power, quicker spool, and extreme durability. We've incorporated stainless flex joints and then down to 70mm to meet the OEM exhaust system. We never drop the diameter to smaller than the stock diameter of 70mm.

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

Please Note: These catalytic converters are not legal for use on vehicles registered in the state of California as a result of California Vehicle Code Section 27156 and 38391.

Features:

• NO CEL for catalytic efficiency when using these downpipes
  
• 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 2013 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:

• 2019-2025 BMW X3M F97 S58
• 2019-2025 BMW X4M F98 S58