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      06-30-2021, 09:17 AM   #1
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Talking Active Autowerke F8x BMW M2C / M3 / M4 Downpipes w GESI G-Sport Cats



For over 30 years, Active Autowerke has been the one to turn to for high quality BMW performance products. Committed to enhancing the performance of BMWs through the highest quality products is what Active Autowerke is all about. The newest addition to our BMW F87 M2C, F80 M3 and F82 M4 Collection, these F8X catted downpipes are a true testament to our outlook on creating innovative products with performance in mind. Developed for precise fitment on the F87 M2C, F80 M3 and F82 BMW M4, the difference in performance will be noticeable the moment you leave your driveway!

This variant includes a pair of 4" ultra high flow GESI catalytic converters (Gen 2 Advanced) that will NOT produce a CEL!
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, perfect for use on 1996 and newer vehicles. GESI proprietary precious metal loading technology ensures greatly reduced emissions, eliminating most "Check Engine Lights". These ultra 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 ultra 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.

NOTE: Federal law prohibits the tampering of an emissions control device. u00a0Mobile Source Enforcement Memorandum 1A, allows for aftermarket parts to be used in the repair or replacement of emissions control systems, provided the emissions are not 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.

Features:

NO CEL when using this downpipe

Quicker turbo spool and response
Less restrictive, more free flowing
Improved low end and mid range performance as well as higher boost levels

GESI EPA registered high flow and fully OBD2 compliant

Casted upper stainless steel V-Band for precise fitment

Withstands up to 1500F

Can reach operational efficiency within 9 seconds of startup

Easily bolts-on with no cutting or welding required
Accepts OEM O2 sensor heat shield

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 catalytic converter)

Made in Miami, Florida

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      06-30-2021, 10:00 PM   #2
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So these should pass emissions right? I bought the single midpipe from you, it might be too early but any sound clips? Please DM me with pricing.

Edit: never mind. I'm sure it's a quality product but that's a bit much for a DP for me
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      07-01-2021, 08:40 AM   #3
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Quote:
Originally Posted by Sahbatage View Post
So these should pass emissions right? I bought the single midpipe from you, it might be too early but any sound clips? Please DM me with pricing.

Edit: never mind. I'm sure it's a quality product but that's a bit much for a DP for me
Im not allowed to answer emission questions as the answer varies from one state to the other. the cats are EPA approved and the downpipes do not throw a check engine light even on non-tuned cars
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      07-02-2021, 12:54 AM   #4
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Someone dyno these bad boys

I wonder how they will hold up to full E85 boost levels.

Would be nice to have a catted option to minimize rasp and smell.
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      07-02-2021, 08:34 AM   #5
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Quote:
Originally Posted by hellokitty View Post
Someone dyno these bad boys

I wonder how they will hold up to full E85 boost levels.

Would be nice to have a catted option to minimize rasp and smell.
I used a custom full E85 map with catted downpipes on my M4, they held up without any issues.
These cats flow just as much as the 200 CEL cats used in other catted downpipes
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      07-02-2021, 11:41 AM   #6
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Quote:
Originally Posted by mike@x-ph.com View Post
Quote:
Originally Posted by hellokitty View Post
Someone dyno these bad boys

I wonder how they will hold up to full E85 boost levels.

Would be nice to have a catted option to minimize rasp and smell.
I used a custom full E85 map with catted downpipes on my M4, they held up without any issues.
These cats flow just as much as the 200 CEL cats used in other catted downpipes
Mike these are on your car?

I wonder what the gains are these vs stock
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      07-02-2021, 01:03 PM   #7
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Quote:
Originally Posted by Mike. View Post
Mike these are on your car?

I wonder what the gains are these vs stock
I already sold my car

i had the Evolution Racewerks catted downpipe. GESI cats flow just as much as the generic 200 CEL cats from all the dynos i have seen.
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      07-09-2021, 01:16 AM   #8
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Has anyone got any information on these compared to OEM downpipes?
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      07-09-2021, 08:33 AM   #9
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Quote:
Originally Posted by Tonba View Post
Has anyone got any information on these compared to OEM downpipes?
Its higher flow than stock, sounds a lot better and more aggressive + no CEL
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      07-20-2021, 01:15 AM   #10
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I wish AA would make a video of how these sound compared to stock.
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      07-23-2021, 08:46 AM   #11
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Quote:
Originally Posted by mike@x-ph.com View Post
Quote:
Originally Posted by Tonba View Post
Has anyone got any information on these compared to OEM downpipes?
Its higher flow than stock, sounds a lot better and more aggressive + no CEL
Mike,

Do you have these in stock?
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      07-23-2021, 09:38 AM   #12
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Quote:
Originally Posted by GuyLedouche View Post
Mike,

Do you have these in stock?
Hi,
these are built to order, takes on average 1 week to ship

Edit: 3 weeks
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Last edited by mike@x-ph.com; 07-26-2021 at 12:22 PM..
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      07-23-2021, 09:57 AM   #13
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Quote:
Originally Posted by mike@x-ph.com View Post
Quote:
Originally Posted by GuyLedouche View Post
Mike,

Do you have these in stock?
Hi,
these are built to order, takes on average 1 week to ship
AA website says they are sold out. Oh well.
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      07-26-2021, 09:41 AM   #14
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Quote:
Originally Posted by GuyLedouche View Post
AA website says they are sold out. Oh well.
They are built to order
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      07-26-2021, 09:46 AM   #15
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Quote:
Originally Posted by GuyLedouche View Post
AA website says they are sold out. Oh well.
The price point on these warrant a BTO type of inventory. They initially had a few sets (of course) but they should update their verbiage.
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      07-26-2021, 11:17 AM   #16
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Quote:
Originally Posted by mike@x-ph.com View Post
Quote:
Originally Posted by GuyLedouche View Post
AA website says they are sold out. Oh well.
They are built to order
I get that. But you can't even add to your cart on AA website. I tried and it says sold out.
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      07-26-2021, 12:22 PM   #17
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Quote:
Originally Posted by GuyLedouche View Post
I get that. But you can't even add to your cart on AA website. I tried and it says sold out.
I checked with Active, these are built to order. The current wait time is 3 weeks for each order.

I see you cant add it to your cart on their website, which is another reason to get it from us instead
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      07-26-2021, 12:53 PM   #18
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Quote:
Originally Posted by mike@x-ph.com View Post
Quote:
Originally Posted by GuyLedouche View Post
I get that. But you can't even add to your cart on AA website. I tried and it says sold out.
I checked with Active, these are built to order. The current wait time is 3 weeks for each order.

I see you cant add it to your cart on their website, which is another reason to get it from us instead
That's a decent point mike. I just ordered.
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      07-26-2021, 02:16 PM   #19
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Quote:
Originally Posted by GuyLedouche View Post
That's a decent point mike. I just ordered.
Thank you
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      07-28-2021, 04:23 PM   #20
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      08-16-2021, 11:59 AM   #21
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Now in stock expected shipping date is next week.
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      08-16-2021, 02:00 PM   #22
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Quote:
Originally Posted by Andrew@ActiveAutowerke View Post
Now in stock expected shipping date is next week.
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