Exhaust› Exhaust Pipes, Systems and Components

Maad Maxx

Double-Canned Rear Exhaust Section

$2,374.99

SKU: ExhF8XM-REAR-G3

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Maad Maxx is a rear exhaust section designed for the F80 BMW M3 and F82 BMW M4. It features a double-canned muffler and flex joints to reduce vibration and resonance. This exhaust system aims to eliminate the unflattering sound of the factory exhaust, providing a deep, throaty growl.
Show original supplier description
The Maad Maxx by Active Autowerke is a valved rear exhaust section engineered to significantly enhance the sound and performance of your F80 BMW M3 or F82 BMW M4. With over 30 years of expertise, Active Autowerke has meticulously designed this system to eliminate the undesirable factory exhaust notes, optimizing flow and resonance for a deep, throaty growl that befits an "M" car. This exhaust system boasts key features such as "Made in the USA" construction, flex joints for vibration reduction, and a double-canned muffler to minimize resonance. It is designed to provide an 18+ WHP gain and a 30+ LB-FT gain over stock, along with quicker turbo spool. The system includes all necessary installation hardware and is guaranteed to fit all F80 BMW M3 and F82 BMW M4 models. When paired with the Active Autowerke F8X Mid-Pipe (sold separately), this rear exhaust section delivers the deepest sound and best performance according to the manufacturer. Dyno results show a peak gain of approximately 18 WHP and 30 WTQ when the full Active Autowerke exhaust system is installed. It is important to note that the Active Autowerke Full Exhaust System is recommended for, but not limited to, off-road or racing applications, and an "Off Road Use Only Waiver" must be signed and returned before the order ships.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandMaad Maxx
Part NumberExhF8XM-REAR-G3
CategoryExhaust
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

Buy with Confidence

Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy