Autowerk Active Sport Catalyst Downpipe for BMW F90 M5 and F92/F93 M8

Description

For over 30 years, Active Autowerke has been the benchmark for high-quality BMW performance products. Enhancing BMW performance through the highest quality products is what Active Autowerke is all about. The latest addition to our BMW F90 M5 collection, these S63TU exhaust downpipes embody our vision of creating innovative, performance-driven products.

The S63TU downpipes are strategically designed to virtually eliminate the extremely restrictive characteristics of the stock M5 downpipes, thereby reducing radiant heat and increasing performance. Our M5 downpipes significantly increase horsepower and torque across the entire powerband. They also reduce turbo lag.

Our F90 M5 downpipes are manufactured in-house from 304 stainless steel. Each assembly is meticulously TIG welded and checked for a perfect fit. Our design uses a factory-fitted 3,5-inch V-band inlet that tapers to a high-flow mandrel-bent body, and includes the lower portion sold by others as a "mid-tube."

**Our exhaust downpipes allow the use of the stock O2 sensor heat shield. Once this shield is installed, the engine bay retains its stock appearance for a more discreet look!

This variant includes a pair of GESI high flow 4,5″ catalytic converters that will NOT produce a CEL!

The GESi G-Sport Ultra High Output Catalytic Converter is constructed entirely of 304 stainless steel, including the substrate. GESi UHO Series catalytic converters are EPA-registered and compliant in 49 US states, and fully OBD2 compliant, making them a perfect fit for 1996 and newer vehicles. GESi's proprietary precious metal loading technology ensures significantly lower emissions, eliminating most check engine lights. These high-flow catalytic converters outperform stock converters and provide a reliable solution to the most common catalytic converter problems.

GESi UHO Series catalytic converters are designed for engines from 500 to 850 horsepower, while maintaining high flow. The reduced back pressure of this high-flow catalytic converter will allow you to maximize your engine's power without harmful emissions. Say goodbye to check engine lights and failed emissions tests!

MAIN FEATURES:

NO CEL for catalytic efficiency when using this downpipe
GESI EPA registered high-speed and fully OBD2 compliant
Cast stainless steel V-shaped top band for a precise fit
4,50-inch diameter piping allows for maximum power output
Faster turbo spool
Designed for 500 to 850 hp applications
Resists up to 1500 F
Can achieve operational efficiency within 9 seconds of startup
Bolts on easily, no cutting or welding required
Accepts OEM O2 sensor heat shield
Durable 304 stainless steel construction with TIG welded construction
Precise adjustment
Very high flow catalyst of 400 cells per square inch
EPA Compliant for use on OBD2 vehicles (1996 and newer) except in California
The 304 stainless steel substrate is furnace brazed to the mantle for exceptional durability
GESi's proprietary precious metal loading technology ensures significantly reduced emissions
Ideal for forced induction applications without power loss
Passengers and drivers are protected from harmful emissions and noise
Backed by a 5 year / 50,000 mile warranty (on shell and tube ends) and a 25,000 mile warranty on the catalytic core
Made in Miami, Florida

Compatibilities:

BMW M5 F90

BMW F92/F93 M8