SKU: 15601970459

Active Autowerke Rear Exhaust System 3 Can w/ valves (maad maxx) - 2014+ M3 / M4

$1592.78 $1769.75
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Description

Active Autowerke Rear Exhaust System 3 Can w/ valves (maad maxx) - 2014+ M3 / M4THE ULTIMATE F8X BMW M3 & M4 REAR EXHAUST SYSTEM NOW WITH VALVES At Active Autowerke, it's not ONLY about making as much power as possible. For over 30 years, power has been the end result of improved performance due to our relentless desire to develop a refined, quality product. This philosophy behind our performance parts is best represented by one of the newest additions to our F80 BMW M3 and F82 BMW M4 collection. The Active Autowerke F8X rear

THE ULTIMATE F8X BMW M3 & M4 REAR EXHAUST SYSTEM - NOW WITH VALVES

At Active Autowerke, it's not ONLY about making as much power as possible. For over 30 years, power has been the end result of improved performance due to our relentless desire to develop a refined, quality product. This philosophy behind our performance parts is best represented by one of the newest additions to our F80 BMW M3 and F82 BMW M4 collection.

The Active Autowerke F8X rear exhaust was carefully engineered to eliminate the unflattering sound of the factory M3 and M4 exhaust, while also allowing for optimum flow and resonance. Every effort was made in addressing the not so appealing sound of the stock OEM exhaust, but in designing an exhaust worthy for an "M" car. We believe our rear exhaust combined with our mid-pipe offers the deepest sound and best performance of any other system on the market today. Available for both models, this axle-back exhaust gives your BMW the deep, throaty, growl a car of its caliber should have had from the factory! And NOW, after many requests from our dedicated customers, we are introducing a valved version of the ultimate exhaust which has been dubbed "Maad Maxx" by our team. We will update dyno charts later but this exhaust flows even better with its valving system.

See what actual customers are saying on BimmerPost!

KEY FEATURES

  • Made in the USA
  • 18+ WHP gain over stock*
  • 30+ LB-FT gain over stock*
  • Quicker turbo spool
  • Low, Deep Rumble
  • Flex joints to reduce vibration
  • Double-canned muffler to reduce resonance
  • Each exhaust test-fit on our F8X Exhaust Fixture
  • Guaranteed to fit all F80 BMW M3/F82 BMW M4
  • Includes all necessary installation hardware

*When paired with Active Autowerke F8X Mid-Pipe

MUSTANG DYNO RESULTS:

MODIFICATIONS:

  • Active Autowerke F8x Mid-Pipe
  • Active Autowerke F8X Rear Exhaust Section

RESULTS:

RED Line Stock Figures: 380 WHP | 371 WTQ

BLUE Line Full Active Autowerke Exhaust: 398 WHP | 401 WTQ

GOLD Line Full Active Autowerke Exhaust Run 2: 397 WHP | 398 WTQ

Note: Active Autowerke Full Exhaust System is recommended for, BUT NOT LIMITED TO, off-road or racing applications.

REFINEMENT MEETS PERFORMANCE:

The OEM F8X exhaust utilizes the services of middle and rear silencers as well as a pair of exhaust valves. It is supposed to be a freely-flowing exhaust that produces an external sound that meets the demands of an M3 or M4.

The middle silencer has a small crossover that allows for noise dampening while the rear silencer (muffler) has a reflection chamber on either end that re-directs exhaust gases to the opposite side they entered from (drive's side exhaust exits on the passenger side). When the exhaust valves are closed, this helps eliminate the backpressure buildup that occurs during noise dampening.

After analyzing the factory exhaust, we realized less would be more in regards to our F8X exhaust.

We began with a complete redesign of the mid-pipes. This involved drastically increasing exhaust flow as well as reducing the uneven, out-of-sync turbocharger sound that many F8X owners have complained about on the forums. We were able to achieve this on our F8X Mid-Pipe (sold separately) by using a single pipe that not only cancels out the offensive sound but allows unrestricted exhaust flow.

The most noticeable difference between the Active Autowerke F8X Rear Exhaust Section and the BMW factory exhaust is how we utilized the muffler. Our design incorporates two mufflers that create a huge resonance chamber to further cancel out the weed eater noise.

This design also allows exhaust gases to crossover freely without being forced in a certain direction - eliminating backpressure without sacrificing that deep, aggressive rumble that some turbocharged cars are known for.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 15601970459

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4.1 ★★★★★
Based on 15 reviews
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Product Reviews
T
Verified Purchase
TeeB
Belleville, US
★★★★★ 4
Baking soda never works out well
Flavor Name: 1. Sensitive Mint, Size: 4 Ounce (Pack of 1)
I don't know why I decided to chance it but it didn't take long for my teeth to start aching. I realized baking soda might be the cause of my toothache issues when I switched between a few and realized the baking soda ones were accompanied by aching. I think I went with this because it claims to be for sensitivity and I thought the nhap would help whatever the baking soda affected but not the case. If you have tooth ache, consider it might actually be the toothpaste and don't just go looking for "sensitive" labels. This might work in combination with other toothpaste. I.e. not multiple times a day but once a day and a different one for other brushing. I've noticed not being as able to tell when it's been a while since I brushed. This was the main change so it might be effective at cleaning. The tube is metal and hard to press but the paste consistency is less firm than others so it works out. It didn't take much to get the paste out. It gives a light foam. The taste is not sweet. It's tolerable but borders on bad.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 16, 2026
P
Verified Purchase
Pamela K.
Dallas, US
★★★★★ 5
Mr. Hancock Intrigues Once Again!
Format: Paperback
Mr. Hancock is a fabulous writer/author that I have had the pleasure of reading for many years now! Be it his non-fiction books or like this book, historical-based fiction, he always leaves you thinking and contemplating life and where we come from and how we fit in on this planet and in the this universe! This book had me right from the very first paragraph, I knew it wouldn't take me long to finish it, which it didn't...of course, leaving me hungry for the next book in this trilogy! I have always been intrigued and fascinated with the paranormal and was pleasantly surprised to find it fitting in perfectly and so naturally in this tale. What I would like to thank Mr. Hancock for is his ability to describe scenes, people, actions, interactions, rituals, etc. in such clear, concise and extreme detail using many rarely-used (anymore in this day and age) adjectives making every page come alive for me! I was so enthralled with his writing in this book that I felt like I was watching a movie...very vivid! I almost felt as if I was in that world and that time while reading this fabulous book! I was relating part of the book to my husband one day and actually started out a sentence by saying to him..."she told me", my gosh...I caught myself in mid-sentence...what was I saying?!?! That's how captivating this book and the story was to me...I WAS there! Thank you once again Mr. Hancock for all you do and all your studies...you are always thought-provoking in all you bring to us...your readers, listeners and followers! Your work and travels are much appreciated and certainly needed for the awakening of mankind...please don't quit sharing with us anytime soon!
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Reviewed in the United States on December 30, 2013
Z
Verified Purchase
Zen
Whiting, US
★★★★★ 5
Gripping & Enthralling
Format: Kindle
Get this book, and jump on the thrill ride. Savage war dogs in full plate armor, human sacrifice on an industrial scale, cannons firing grapeshot point blank into charging hordes of unsuspecting warriors, intense duels within the Spanish and Native groups... this book is graphic and hard to put down. Just be aware that as pt. 1 of a trilogy, it WILL leave you hanging, and wanting more. I suppose that is just the nature of the beast... and we must patiently await pt. 2. Far more historical than a fantasy, but more fantastic than a history... this novel falls almost perfectly into that middle ground, sweet spot. It is extremely well researched, with few liberties taken, so you really feel like you are observing things that could very well have transpired. However, it goes beyond a flat, boring recreation of the extant journals and histories of the conquest of New Spain, and introduces vivid characters, visions, dreams, and witchcraft to bring the tale to life. Historians might appreciate the graphic and accurate depictions of battles and intrigue, and fantasy buffs might dig the subplots involving mushroom visions, metaphysical "gods," and a young witch in Tenochtitlan (being stuff that couldn't be derived from source material and must come from the prolific mind of Mr. Hancock). Some might prefer these things stay separate and "never the twain shall meet," but there are books enough for purists out there. What Graham Hancock has done is present a page-turning story which fully draws the reader into a world which is a fairly good estimation of that world that existed when Cortez & his worldview met the Mexica & the Maya... and supplanted theirs. Given that most everyone on Earth already knows this story--and how it ends--it was IMHO a very wise decision for the author to add drama and tension by fleshing this out into a "fictional" novel. I would say the breakdown is 1/3rd non-fiction, 1/3rd logical extrapolations from what we know, and 1/3rd pure fantasy. I honestly can't say which part I prefer. Just do yourself a favor and read this.
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Reviewed in the United States on March 6, 2014
G
Verified Purchase
Gsorme
Whiting, US
★★★★★ 4
Very impressive
Format: Paperback
I approached this one with caution and came away impressed, glad to have read it, and looking forward to the sequel. It's a fascinating and occasionally breathtaking novel. Hancock has a knack for writing compelling fiction. It's funny: often when people write reviews of his non-fiction books they'll say they read like good thrillers. This one is compelling as fiction but also had enough historical detail to keep me interested beyond the plot and to make me think about the Spanish conquest of Mexico in a different light. I was very grateful for the endnote by Hancock giving an overview of the types of "fictional" elements he introduced into the book (such as combining a couple of historical events into a single event in order to keep the appropriate pace for a novel) because this clarified things and allowed me to come away from the book with a deeper overall understanding of that period in history--which Hancock really does bring alive. Granted, this is Hancock's take on it--even non-fiction historical books have an author's "take" on events--but it seems to be a very well-informed take. Mixed in are supernatural elements and hints of the non-orthodox elements of history that Hancock is known for investigating in his non-fiction. For me, the blend was good. It's not a perfect novel. For example, the style of switching perspective from character to character from short chapter to short chapter was a bit jarring at first; I found it unnecessary and it ended up taking me out of the narrative for a few short moments. (Perhaps this was done to "hit the ground running" and introduce the large cast of characters and plot threads quickly; still, for me it was too much at first.) However, this stylistic approach shifts as the book goes on; the sequences become longer and occasionally blend together. Ultimately this worked, especially given the large cast and numerous plots the book juggles. If it hadn't worked, I would've put the book down; as it was, I did end up turning pages (on my Kindle) rather quickly and not getting bored. There is an immense amount of blood and gore. Very graphic. I won't pass judgment on it. It did give a pretty visceral impression of the whole human sacrifice element of the Mexica and other peoples, and of what battle was probably like at the time. Character-wise the book is diverse and interesting. There are a few semi-saccharine moments and lightly-drawn characters, but in general all are developed to help drive the story forward and to offer possible insights into their historical counterparts. Ultimately I guess we could call this a "sprawling epic," one that wraps up the first part of its story at the end but leaves a huge section to be developed in the next installment. I hope we don't have to wait too long. As I said at the beginning of this review, I didn't really know what to expect from this book but it really was quite fluid, exciting, surprising, and enlightening. Very impressive.
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Reviewed in the United States on August 3, 2013
J
Verified Purchase
Jason M.
West Palm Beach, US
★★★★★ 5
Graham Hancock has woven a compelling tale of historical fiction that does not feel like history or fiction
Format: Kindle
This has been a relentless and compelling read from page one and comes from one of the most innovative thinkers of our time. Graham Hancock has woven a compelling tale of historical fiction that does not feel like history or fiction. Its characters are real and relatable for their humanity, their virtues, their vices, and their corruption. I especially enjoy his characterization of Montezuma and Cortes, two iconic characters from the pages of history who become living, breathing, understandable humans for the readers. The supernatural elements of the story are undeniably present, but they are handled in a way that blends into the tapestry of the story rather than as silly plot devices. Also, those same supernatural elements help throw into sharper relief the unimaginable brutality and horror of which both of these great civilizations on a collision course were capable. The violence is brutal and horrific, no doubt, but for me the gentleness and humanity of the author in describing it softens its impact. Also, even though the book ventures into some very dark, cruel times in human history, the goodness and humanity of many of the characters prevents the story from becoming a tale of despair or hopelessness. I am a fan of Graham Hancock's non-fiction work, and this book firmly cements him as a fiction author I will be revisiting. Superb!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 28, 2015

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