07-31-2023, 02:25 PM | #1 |
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MAD: New Product Release -G8x M3 M4 Axle Back Exhaust
MAD G8x M3 M4 Axle Back Exhaust The G8x M3/M4 excels in nearly every aspect compared to its precursor, but the prevailing concern among enthusiasts lies in its sound quality. Similar to its predecessor, the S55 in the F8x, the S58 in the current generation still leaves room for improvement. While the stock sounds are a step up from the previous generation, they still have an excess of raspiness that fails to convey the refined aggression inherent to the brand's signature performance models. MAD remedies this shortcoming with a valved axle back exhaust system that delivers a deeper, more impactful note, and adds a level of amplification beyond the stock version. When paired with the optional single midpipe, it yields an even louder, smoother, and fuller sound. To achieve the desired sound volume and tone befitting the G8x M3/M4, we increased the tubing size to 76mm (from the stock's 70mm), which reduces backpressure and allows a freer flow throughout the system. The larger piping diverges into multiple paths as it approaches the vehicle's rear, the choice of which is determined by the factory exhaust valves that are retained. When the valves are closed, flow is directed into the MAD muffler, and exits through the two inner tips. This restricts noise during low-speed driving and produces a more subdued yet deeper sound. When the valves are open during high-load conditions, most gases bypass the muffler entirely for a near-straight pipe design, achieving maximum aural enjoyment. This harmonious balance satisfies a range of tastes and offers civility or passionate aggression as the situation demands. MAD has determined this combination to be appropriate for the brand's signature performance models that cater to discerning enthusiasts who want the best in all scenarios. Visually, MAD's G8x M3/M4 exhaust is meticulously constructed entirely from T304 stainless steel and TIG welded for superior visual appeal and color. The entire system is brush finished for a perfect look straight out of the box. The attention to detail isn't limited to the unseen parts once the exhaust is installed; it extends to the exhaust tips as well. MAD's exhaust includes substantial quad 4.5-inch (114mm) clamp-on exhaust tips. Despite their large size on paper, the tips seamlessly integrate and fill the factory cut-outs, achieving the OEM+ look with an added touch of audible attitude. Features: Connects to Factory Midpipe (Cutting required) or MAD Single Midpipe (No Cutting required) Maximum gains of +5 HP and +5 lb-ft of torque Pleasingly louder, sportier sound Drone abatement technologies reduce cabin resonance 4.5-inch (114mm) tips Larger diameter piping for increased flow (76mm vs. 70mm) 7-pounds lighter than the stock axle back (Stock: 44-pounds vs. MAD: 37-pounds) Reuses stock exhaust valve actuators, and the operation of exhaust valve is unchanged so the exhaust tone can be adjusted via the M-drive settings Includes extended valve harness Computer-controlled exhaust valves are retained and limit noise during low-speed driving, and open fully during high-load conditions 100% 304 Stainless Steel construction Factory-like fitment with included mounting hardware Visit our site for Pricing
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Last edited by Info@mad-us.com; 09-12-2023 at 06:18 PM.. |
07-31-2023, 04:21 PM | #3 |
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Connects to Factory Midpipe (Cutting required) or MAD Single Midpipe (No Cutting required)
For those already having Active Autowerke Equal Length Midpipe... I'm assuming since the AA EL connects to stock axle back, and this requires cutting to connect to stock midpipe, those trying to hook this up to AA EL would need a modification, not direct fit? |
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07-31-2023, 05:11 PM | #4 | |
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08-01-2023, 12:35 AM | #5 | |
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I would recommend our resonated midpipe to get the smoothest sound.
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08-01-2023, 07:54 AM | #7 |
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Saw this video a few weeks ago. Sounds pretty good, especially for the price!
Any chance of some additional sound clips? NRP was kinda stingy. Thanks! |
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08-01-2023, 10:05 AM | #8 |
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Sent them this thread. They are going to work on a new video 👍
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08-01-2023, 06:33 PM | #10 |
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Drives: 2023 G80 M3 Competition Xdrive
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I'm looking to pre-order but do you have any pics of the Carbon tips? curious to see what they look like before I order.
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08-01-2023, 08:25 PM | #11 | |
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The tips are fully adjustable.
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08-04-2023, 02:18 AM | #12 | |
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Are you going to sell this as a complete catback system? (Was really interested in this) Or do I have to buy a midpipe and axle back separately? Or both options are available cause I don't see a full catback pre order option available yet? Last edited by Johndaks; 08-04-2023 at 11:30 AM.. Reason: Proof |
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08-04-2023, 08:52 AM | #13 | |
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08-04-2023, 12:45 PM | #14 |
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Sub'd for an axle back sound clip. Love the look of it and a lighter version than going with a full setup.
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08-04-2023, 01:08 PM | #15 | |
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After listening to customer feedback we have decided to sell them as separate products that can be used alone or together as a full system. I believe this allows for a more flexible exhaust system and better for everyone in the long run. Our retail pricing is $98 over what we initially wanted but of course with your forum discount you can get it even lower than 2500 Shipped.
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Last edited by Info@mad-us.com; 08-04-2023 at 09:20 PM.. |
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08-04-2023, 01:13 PM | #16 |
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Both Mid Pipes versions are ready to ship and axle backs are due to ship October 8th.
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08-04-2023, 02:53 PM | #17 | |
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08-04-2023, 04:45 PM | #18 |
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Dope! Oem downpipes, just need the option of 100% quiet for headaches and hang overs lol
Glad I waited! I’d like to support a smaller company than Dinan. |
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08-04-2023, 04:50 PM | #19 | |
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Appreciate it! Maybe consider going resonated and a valve controller.
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Last edited by Info@mad-us.com; 08-04-2023 at 04:58 PM.. |
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08-20-2023, 11:46 PM | #20 | |
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Interested in midpipe / axel |
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08-21-2023, 10:12 AM | #21 |
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You have pm.
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