NOTE: This downpipe is catted and meets EPA standards but is not CARB-compliant!

"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 G80 M3 and G82 M4 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. As the first step of the Active Autowerke G80 M3/M4 collection, we are introducing our catted signature down pipe.

The Active Autowerke G80/G82 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." - Active Autowerke

Features:

• NO CEL for catalytic efficiency when using these downpipes

• GESI EPA registered high flow and fully OBD2 compliant

• The most advanced cats produced by GESI today

• 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 per cat
  

• 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

• EPA compliant for use on OBD2 vehicles (1996 and newer) except in California

• 304 stainless steel substrate is furnace braised to the mantle for outstanding durability

• GESI proprietary precious metal loading technology ensures greatly reduced emissions

• 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

FITS:

BMW G80 M3/G82 M4