BMW E46 M3 Exhaust SECTION 1 with GESI G-Sport catalytic converters

Active Autowerke BMW E46 M3 Exhaust SECTION 1 with GESI G-Sport catalysts

Combine the Active Autowerke Exhaust SECTION 1 with a pair of GESI G-Sport ultra high flow 400 cell metallic catalysts and you have part of a winning combination for your BMW E46 M3.

Design and Concept:
Why create an exhaust SECTION 1 when the USA version BMW factory SECTION 1 already comes from the factory as a straight through design with two separate pipes and resonators already built in on one side?
If a performance aftermarket headers was installed, how much better could one gain against the already BMW factory SECTION 1?

Solution:
The BMW Factory Section 1 with RASP like sound Active Autowerke Exhaust SECTION 1 only comes into play if the E46 M3 already has a performance header already installed. One will experience a high smell of unburnt fuel. (due to the open exhaust w/o any catalysts) and development of a RASPY like sound of which the BMW S54 engine is notorious for with the BMW Stock Section 1 when equipped. This raspy like sound is a matter of engine sound harmonics at a specific RPM range, a sort of resonance that is very loud and noticeable when the engine is revving at or above 4,000 rpm.

This is the BMW section 1 - where the RASP like noise emits from.

With the Active Autowerke Exhaust SECTION 1 installed, the BMW performance gains are about the same as running the factory section 1. However, that's impressive considering the exhaust flow is also being filtered while running through a pair of 400 cell catalysts. The power and performance is still there. Includes extension cables for the rear O2 sensors.

Gone is the smell of unburnt fuel. A BIG advantage.
Gone is the RASP like sound. Another BIG advanatge.

-One year warranty with Free Tech support - two year warranty on Cats for no CEL on cat efficien
This variant includes a 4.5" high flow GESI catalytic converter that will NOT produce a CEL for cat efficiency. The GESi G-Sport Ultra High Output Catalytic Converter features full 304 stainless steel construction, including the substrate. GESi UHO-Series Catalytic Converters are EPA registered and compliant in 49 states and fully OBD2 compliant. GESi proprietary precious metal loading technology ensures greatly reduced 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.

The GESi UHO-Series Catalytic Converters are rated for engines putting out between 500 and 850 horsepower while maintaining a high flow capacity. The reduced back-pressure from this high flow catalytic converter will allow you to maximize your engines horsepower without the harmful emissions. Say goodbye to Check Engine Lights and failed emissions tests!

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 this exhaust component
-Designed to be as unrestrictive as possible
-GESI EPA registered high flow and fully OBD2 compliant
-High flow 4.50" GESI cat with 3.50" piping allows for maximum power output
-Quicker turbo spool - improved power over stock
-Rated for 500 to 850 hp applications
-Withstands up to 1500 F
-Can reach operational efficiency within 9 seconds of startup
-Utilizes factory mounting points for easy bolt-on install
-Durable construction from TIG welded 304 stainless steel
-Precise fitment
-Made in Miami, Florida
-Ultra high flow 400 cell per square inch catalyst
-EPA compliant for use on OBD2 vehicles (1996 and newer) except in California
-Full 304 stainless steel construction
-304 stainless steel substrate in the catalytic converter 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 to original purchaser only - NOTE: warranty will be null and void if your car has excessive burble (greater than stock) as that physically destroys the catalytic core

NOTE: Federal law prohibits the tampering of an emissions control device. Mobile Source Enforcement Memorandum 1A, allows for aftermarket parts to be used in the repair or replacement of emissions control systems, provided the emissions aren't adversely affected. There is no mention or reference to cell density or converter volume dimension. The GESI catalytic converter will produce emissions that will meet the standards set by the EPA, not CARB.