[Dinan_Engineering]

     Featured on BIMMERPOST.com

Part Number(s): D660-0098 & D660-0098-BLK
Applications:

• 2022-2023 G42 M240i (& xDrive)

Product Page(s) / Pricing: dinan.info/G42-FFE
Release Date: Available Now!

Description: The 2 series is the nearest embodiment of legacy BMW ideals in today's lineup. As such, in both the non-M and M trims, the series is continuously lusted after by the enthusiast community. While the G87 M2 may get the lion's share of publicity, the G42 M240i is equally as enticing and offers a robust value proposition for individuals looking to balance performance with comfort. Equipped with the latest B58 engine also found in the M340i and M440i, the M240i has performance covered in spades. Beyond the vaunted engine, the platform also borrows numerous other components from its 3 and 4 series counterparts. As such, it made sense to imbue the latest M240i with the same Dinan exhaust treatment the aforementioned models received and were heralded for -- an economical valved system with quad tips.

Quad exhaust tips have been a signature feature of the most powerful letter in the automotive sphere for quite some time. It is a hallmark of the brand that Dinan has long embraced, limiting its own quad tip usage to those M cars that already sported like tip quantity from the factory. That is until the release of the Dinan exhaust systems for the G20 M340i and G22 M440i in 2019 and now extending to the G2 M240i today. While some may scoff at the feature being implemented into a "pseudo-M," the M240i, and the B58 engine platform, are extremely potent and worthy of such a distinction. The factory valance also accommodates the four massive 102mm tips perfectly, further cementing our opinion that the quad tips were destined to be on this performance model. Being numerous and big are not the only selling points to the tips however. Dinan has retained its signature straight cut tip design, safeguarding its unique and elegant styling position amongst a crowded marketplace full of angle cuts. With systems available with either black ceramic coated or polished clamp-on, and laser engraved exhaust tips, there is a version that is sure to meet your individual aesthetic needs.

The use of quad tips also presented some additional challenges and fostered some innovation to the already visually impressive system constructed entirely of TIG welded and brushed T304 stainless steel. Confined to dual tips, the factory system utilizes only one exhaust valve and functions by eliminating the passenger side tip when the valve is closed, siphoning all gases through the muffler and out the driver's side tip for quieter operation. With the introduction of more pipes/tips, this methodology was not practical, or desired. In true Dinan M exhaust fashion, our talented engineering team decided that integrating a second valve to the system would garner the most favorable results in both symmetry and overall sound. The result is a system that incorporates larger 76mm tubing (vs 70mm stock) and allows freer flow through the entirety of the system but specifically to both outer pipes when the enlarged valves are open. The resulting flow and sound mimics an awe-inspiring straight pipe solution with a deeper and meatier tone, a defining element of all Dinan exhausts. In contradiction to the aggressiveness resulting from open valves, when the valves are closed, all gases are forced into the muffler for sound deadening and exit the two inner tips. Regardless of valve position, the intimate nature of the interior is retained so conversation can continue without an excessively loud drone courtesy of numerous drone abatement technologies in the can. With the Dinan exhaust equipped on the M240i you get the best of both worlds; aggressive tone/sound and civility. A combination that is paramount to any M exhaust, and now by virtue of tip count, the M240i as well. Welcome to the illustrious family.

Features/Benefits:

• More Power: + 6 HP @ 6600 RPM, + 5 LB-FT @ 6600 RPM
• Enjoyably louder, sportier sound
• Quad 4" diameter clamp-on, double-walled, black ceramic coated and laser engraved exhaust tips
• 100% 304 stainless steel construction
• Larger diameter piping for increased flow (76mm vs 70mm)
• 4 pounds lighter than the stock system
• Stock exhaust valve actuator reused, and another valve/actuator added to the opposing side promoting even flow regardless of valve position
• Computer controlled exhaust valves are retained and limit noise during low-speed driving and open fully during high-load conditions
• Twin exhaust valves are a whopping 76mm diameter, making them 30% less restrictive than the OE valves
• Factory-like fitment with included mounting hardware

[TJZ67201]

Nice! Great sound, adding this to my short list

[zipstic]

Sounds pretty good! Not a bad price for a Dinan exhaust.

[///M TOWN]

Sounds 💯 better than the G87 M2

Imagine that

[Dinan_Engineering]

Originally Posted by ///M TOWN

Sounds 💯 better than the G87 M2

Imagine that

Amazing the sound difference between the S58 and B58 isn't it?

[///M TOWN]

Originally Posted by Dinan_Engineering

Amazing the sound difference between the S58 and B58 isn't it?

Yeah it’s crazy how corked-up the twin turbo 6 sounds vs a single turbo twin-scroll 6

[In Extremis]

Oh this is actually why I was visiting bimmerpost today. I went to the Dinan site this weekend, and was disappointed it wasn’t there yet. Price doesn’t look too bad either, some of the other options are a bit expensive for this car.

[NotSharocks]

This over the M2.

Sounds better (this is a fact)
Looks better (subjective okay fine)
Has purple as an option (this is a fact, LOL Zandvoort)
Doesn't have the most rice door cards known to Bimmerkind

Someone swap a manual into this thing already.

Quad exhaust makes this thing look better actually, really dig it, good job Bama.

[cfm56d7b]

In the emerging age of EV vehicles, even the best digitized exhaust sound wil never come close to the real thing. Thank you for making history with every sale, Dinan_Engineering .

[German1967]

Given it’s a slip-on I presume no trouble with emissions and / or CEL?

[Dinan_Engineering]

Originally Posted by German1967

Given it’s a slip-on I presume no trouble with emissions and / or CEL?

No issues with emissions, CEL, or legality in CA. All emissions controls are left intact.

[burkhacs]

Are there smaller tips available? Those are awkwardly big for my taste.

[Dinan_Engineering]

Originally Posted by burkhacs

Are there smaller tips available? Those are awkwardly big for my taste.

Kit only comes with the one size and our present tip catalog doesnt have any smaller diameters for the clamp on's unfortunately. All of our clamp-ons are 4"-4.5". Could always source a 3rd party tip if desired though. Just needs to mate to a 3" OD pipe and be around 5.5" in total length.

[CaliGuy]

Originally Posted by burkhacs

Are there smaller tips available? Those are awkwardly big for my taste.

lol, thats what I love about it!

[heelsmj]

Is the second actuator valve controlled as a “slave” to the factory one? Or do you need to control it separately?

[Dinan_Engineering]

Originally Posted by heelsmj

Is the second actuator valve controlled as a “slave” to the factory one? Or do you need to control it separately?

Slave. Wiring harness is effectively T'd so factory valve communication is sent to both sides concurrently.

[Tch-Nrd]

This work on the new Z4s?

[Dinan_Engineering]

Originally Posted by Tch-Nrd

This work on the new Z4s?

Never tested, but doubtful.

[TheGeekGuy]

Any recommendation of a dealer in SoCal who can sell and fit this?

[Dinan_Engineering]

Originally Posted by TheGeekGuy

Any recommendation of a dealer in SoCal who can sell and fit this?

There are a number of dealers in SoCal. To see who may be closest to you put in your ZIP at https://www.dinancars.com/dealers/. That said, EAS or Bavarian Worskhop are probably the most prolific in the area.

[TJZ67201]

Can this be done DIY - is there any welding or is it similar to the M Perf exhaust which is bolt/clamp on? Seems like it from the photos just wanted to confirm.

One more question - Was there any testing with stock sound vs Dinan when cruising at highways speeds with valves shut? Looking for something that would be similar stock with no drone when cruising.

[viperx100]

Sounds and looks really good. What's up with $204.79 for shipping to Maryland, though?