WILL THIS SOLVE MY S55 RASP? (Dinan Muffler M4GTS)

CURRENT SETUP-
DINAN EXHAUST: tinyurl.com/yc...
Active Autowerke EL Midpipe: tinyurl.com/mt...
Catless Downpipes: tinyurl.com/mv...
My F8X Build Sheet: tinyurl.com/mp...
My Wheel & Tire Fitments: www.thicf30.co...
ThicWhips Merch, Apparels, Decals: tinyurl.com/yv...
FACEBOOK GROUP: tinyurl.com/m4...
ALL MODIFICATIONS:
thicwhips.com/
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Discounts & Codes: tinyurl.com/5n...
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**Some links may be affiliate links, meaning I earn a commission when you make a purchase. Thank you for the support!
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Links to current F8X mods:
Yellow DRLs: tinyurl.com/5n...
Active Autowerke EL Midpipe: tinyurl.com/mt...
Active Autowerke Single Midpipe: tinyurl.com/3z...
Goldenwrench Performance Caps: tinyurl.com/mw...
All BMW F Series Carbon Fiber Parts: tinyurl.com/54...
Black Illuminated M Seat Badges: tinyurl.com/y8...
Bootmod3 Tune: tinyurl.com/yb...
Turner Skid Plate: tinyurl.com/4x...
Mosselman Oil Thermostat: tinyurl.com/46...
Eventuri Intake: tinyurl.com/2p...
Eventuri Charge Pipes: tinyurl.com/2a...
Eventuri Carbon Engine Cover: tinyurl.com/yf...
Mishimoto Oil Cooler: tinyurl.com/3b...
Black M4 GTS Badge: tinyurl.com/2t...
BMW Shadowline Roundels: tinyurl.com/6f...
Paint Matched Reflectors: tinyurl.com/mu...
Insane Performance 2 Pin Crank Hub: tinyurl.com/2w...
Max PSI Crank Hub: tinyurl.com/y2...
Kies Crank Guard: tinyurl.com/2p...
Mishimoto Heat Exchanger: tinyurl.com/y4...
CSF Charge Cooler: tinyurl.com/y4...
Carbon SS Extensions: tinyurl.com/yy...
R1 3 Piece Carbon diffuser: tinyurl.com/2p...
GTS Style Carbon Front Lip: tinyurl.com/2p...
MPERF Carbon Sideskirt Extensions: tinyurl.com/2u...
Carbon Seatbacks: tinyurl.com/y3...
Motorsport Hardware Stud Conversion Kit: tinyurl.com/y9...
Custom Coding: tinyurl.com/mf...
KW Coilovers: tinyurl.com/2c...
Hi Flow Catted Downpipes: tinyurl.com/2p...
APEX VS5-RS Wheels: tinyurl.com/yc...
Valvetronic Equal Length Exhaust: tinyurl.com/y4...
Falken RT660 Tires: amzn.to/3FyK1m7
Michelin PS4s: amzn.to/3NkbMl0
Liqui Moly 5w-30 Special Tec: tinyurl.com/yc...
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My Filming Gear:
Canon Eos M6: geni.us/DSaK
(Vlog Lens) Canon 11-22mm Lens: geni.us/Vbh4
(Shoot Lens) 50mm Canon Lens: geni.us/jTTQc
Rode Video Micro Microphone: geni.us/BzE5Ld
Joby Gorillapod: geni.us/tfrwId
Macbook Pro M1: geni.us/MLmoD0
Mavic Mini Drone: geni.us/4Ypz8
GoPro 8 Hero Black: geni.us/ynB5
GoPro Hero 10: geni.us/1ssw8nH
Go pro Head Mount: geni.us/F6Nt6f
Camera Window Suction Mount: geni.us/bJccNG
Camera Backpack: geni.us/uBsM
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Garage & Tools:
Garage LED Lights: geni.us/ZOSr
Veepeak OBD2 Diagnostic Tool: geni.us/8h3Xcf
Blackvue Dashcam (10% off using ThicF30 Code): tinyurl.com/42...
Valentine 1 Radar Detector: geni.us/kIdT11f
Uniden R3 Radar Detector: geni.us/GAX5
Uniden Radar Mount & Hardwire Kit: geni.us/xPQJ
Detailing Bag: geni.us/CTZcRZ
Car Dryer: geni.us/VByILHv
Dragy Performance Meter: bit.ly/3wO3r3M
Trim Tool Set: geni.us/t1idZ
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Detailing Products I Use:
tinyurl.com/2a...

[@mamounmustafa1982]

This guy is one of the best channels on youtube. Has the best taste in modding. All his cars end up looking the best on youtube. More love brother.

[@F80_Nick]

This is why we needed Thic to finally do a F8X, not afraid to try it all!!

[@ThicWhips]

🫡

[@Unamatrix01]

Quite an interesting video, Johnathan. As a mechanical engineer, what you are trying to attain is the perfect NVH (Noise, Vibration and Harshness) balance to your liking. As you have already discerned that your next options or iteration would be non-resonated catless down pipes and the Active Aoutowerks single exit mid-pipe. I would suggest not mixing metals such as stainless steel, aluminum and titanium, not only because of varying sound resonance characteristics but also galvanic corrosion. If after completing the iteration process, you are still not satisfied with the sound to the exhaust system, you may want to look into a muffler with Helmholtz chambers. I am not aware of any systems for BMW's at the moment. Companies such as HKS and Motordyne use Helmholtz chambers in their High-Power exhausts system for the Nissan Z33,Z34 platform along with the Infiniti V35 coupe, Motordyne makes tuned test-pipes in the form of ART Pipes (Active Resonance Tuning) that fit 350 Z,370 Z, Infiniti G35 coupe' and sedans along with the Q50 and Q60. Helmholtz chambers allow for the tuning of the exhaust flow to prevent boundary separation, wave propagation, as well as flow modification for either turbulent flow or laminar flow. The other point that I would suggest being cognizant of is congruent internal diameter to allow steady state flow continuation i.e. 7.62 cm or 3" to 6.98 cm or 2.75" would create perturbations a rotating turbulent flow and therefore transition the flow state to turbulent until it reaches the muffler. Due to the baffling as well as sound-absorbing material in the muffler, the flow state will always be turbulent. The rasp sound that you dislike falls under the Harshness category of NVH analysis.

[@enigmo08]

+1 on trying the Helmholtz, it’s eliminated the harsh rasp on my n54 E92. You could use a J shaped pipe that is capped off or they make cherry style chambers you can add towards the rear section of the exhaust by the muffler. There is info on this online of how to calculate the length of pipe needed vs rpm speed with the rasp. The width of the pipe has to be the same diameter as the rest of the exhaust tubing.

[@carsandcoldbrew6489]

Someone in the Bimmerforums took a F8x competition muffler, cut it open, and added hemholtz chambers in the piping within the muffler. I wish I could've heard what it sounded like, but the owner sold the car before he could put it on. Catted downpipes that were 400-600 cell hid rasp really well and sounded more raw with a non-resonated set-up with Active Autowerke's midpipes, while 200 cell catted downpipes and a 4-10" resonators seemed to work well together to combat rasp and drone with any choice of backbox. It's interesting you said about pairing up different metals and going from 3" piping to smaller piping affects sound and possibly performance. I've tried many variations to find the right sounds using the Mperformance titanium Muffler and the stock steel muffler with Active's single and equal length midpipes. I'm currently looking for a more complete system using the same metal from downpipe to muffler.

[@davjones8636]

IMO I don't think changing out to single mid pipe will change the "body", I think it'll effect the tone. I think you should take out one of the resonated sections either do non res catless dp or non res EL midpipe. Either way I'm glad someone is really taking a deep dive into the s55 exhaust and trying out different pieces because it's one of the most annoying parts trying to get right. You should check out teamschirmer's diff risers and solid bushing makes an awesome diff whine in the rear.

[@abirmahmud1334]

Single turbo m4 is something else though 😩

[@F80Ho]

The quest to find the best exhaust note continues for the both of us 😂

[@Svall23]

i have the arm dp + single mid pipe setup on mine with burbles turned off, best tt s55 setup i’ve heard by far

[@Slowwasian]

I'm in the exact same boat. I have the ARM downpipes, EL resonated mid, and Remus axleback. I completely agree that it takes that growl and body out. Gonna be trying the single midpipe myself, interested to see your opinion

[@danielmack9284]

I have the DP’s single mid and Remus. It is spicy, and the perfect combo imo. Valves closed is tame and civilized, open is a party. One thing I did notice is going full e85 gave the exhaust and extra bit of nasty from the advanced timing.

[@Slowwasian]

@@danielmack9284 great to hear. Just ordered a single midpipe

[@TaylorMadeMoment]

Dude this is so awesome, by the time I can afford my M4 you’ll have the perfect exhaust figured out and I won’t have to waste any money. You’re a hero man.

[@abhishekgupta5315]

when the valve is open, its basically a straight pipe. because there is no resistance in that path and almost no air goes through muffler box.

[@buqueretrofittinganddetail6224]

It's sounds so nice bro ,it's perfect

[@spy2sa54]

I love love love this setup

[@rlarocque214]

I have the Active Autowerke EL (Equal Length) midpipe paired with the AA axleback on my F82 Comp. Nothing sounds better IMO. Absolutely no rasp and it's throaty, even and deep. I have the Active Autowerke single midpipe on order for my G82 Comp though

[@kevind74]

Did you notice the dreaded 2k rasp with the el mid pipe under load? My el midpipe sounds great but at 2k if I’m on it it let’s out a nasty fart

[@ThicWhips]

Yes. It was horrendous. I went single mid and it’s much better

[@carfeen]

I personally think I’d go catless just resonators with mpe muffler idk what the love/hate ratio of the rasp is but i like how the s55 sounds

[@daniellekoran7906]

with the mpe muffler, you also get the whole system that you'll end up just throwing in the garbage.

[@ATron35]

I have the Valvetronic exhaust on my M2 competition which is an equal length system and it sounds great and got rid of that rasp. The fitment wasn't the best though and I think they took down all of there S55 equal length systems since I've been going back and forth with their customer service about the fitment issues.

[@josephdarco8677]

Describing exhaust sound with a level of detail usually reserved for fine wine, haha, love it.

[@Dutch3men]

Have you ever considered removing the burbles? I think that rasp is also generated by that. And for my opinion burbles doesn't suite the car, without it sounds way better.

[@eugenebeaty4142]

Nah it’s the other way around the burbles are affected by the rasp

[@MIXDSolutions]

Single mid all day!

[@TommyLGarage]

Single AA midpipe is your answer. Ask me how I know.

[@user-omgbaozi]

miss you and your M3 videos Tommy 😭

[@TommyLGarage]

@@user-omgbaozi will be back with a Big Bang soon!

[@froded3245]

It is time to try the #inkedcustom midpipe. That one has larger pipes (70mm) and has a deeper tone that compared to AA.

[@sb8536]

When will you try the single midpipe? Just installed the equal lenght but don't like it at all. All I hear is high pitched rasp now (downpipe & akrapovic) and damn do I miss the deep sound of my M-performance! Might try to put it on the mpe but don't want to cut that one aswell

[@christopherwilliams1702]

Which rear diffuser set up did you use? I have the factory diffuser over the pipe set up, I'm looking for the two sides that wrap around the back of the car.

[@thecarsavant]

Was you EL Midpipe the resonated or non-resonated version?

[@coryyo]

How were you able to just press the m button and the exhaust would open up at 8:11? I need to blip the throttle a little in order for the valves in my car to open up

[@eugene1822]

When is the roll cage coming in?

[@shelbybg6694]

When you put it to rest on the stand, do you use an adaptor ?

[@brianorlando6423]

I'm kind of new to the BMW world. I just purchased about 6 weeks ago a 2008 550i m sport which ofcoursehas the 4.8L V8. I live in Michigan but it was a Texas car so it never saw snow or salt not to mention it has only 70,000 original miles on it. My point it's in near mint condition so I want to do things right. This might be a stupid question but does Dinan make the same exhaust but a single pipe (dual tips ofcourse)? This is exactly the set up I've been looking for, the option to open and close depending on your environment. Anybody that coukd give me any information on this would be greatly appreciated. I'd take other suggestions also. I'm on kind of a budget so I don't want to break the bank to do it which I have a feeling that might be hard to avoid but I would love to hear from more experienced BMW owners. Thx guys

[@nickaero5497]

Have you checked out Milltek? Running Milltek race exhaust on my m235i with a high flow cat and it’s DEEP!

[@taeojohnston]

In my experience, leave the resonators (if you haven’t already touched them). That’s responsible for the majority of the rasp

[@SpiritTracks95]

I've had my m4 for like 8 months now and all i did was get the k&n filters and you literally went ALL OUT in 2 months? insane XD

[@M3srry]

Have you seen footage of the AA Single MP paired with the Remus Axleback, in my opinion that is the best setup with the deep throatiness of the inline 6 and also screams at the top end but in the most refined and throaty way, please look into it if you get the chance!

[@Nahluwalia94]

check my video I uploaded. I have both setups, except single midpipe was non resonated. I just made the switch recently and I am conflicted as well. Equal length resonated made it much quieter IMO, but has a deeper tone

[@Slowwasian]

I like the single for sure. Are you on stock turbos or pures? Lots of turbo spool on the exhaust note

[@Nahluwalia94]

@@Slowwasian stock turbos. On f80 paul flex map on e30. Have front mount intakes too

[@Slowwasian]

@@Nahluwalia94 wow that's awesome. Definitely like the more pronounced spool of the single mid. I just installed some project gamma front mounts this past weekend too.

[@Nahluwalia94]

@@Slowwasian thanks. I may try to add the non resonated section from my single mid to swap onto the equal length, and then maybe add the single mid with resonated rear section. Lol

[@Slowwasian]

@@Nahluwalia94 the endless pursuit for the perfect S55 exhaust note lol, I'm gonna go single turbo down the line which is the best sound imo

[@TUNINGDONERIGHTMX5]

BTW any drone with the Downpipes at cruise with valves open ?

[@GoBrand0n]

No offense, but that rear Wing doesn't sit well on your car.

[@joeponder9668]

Brother, stop fooling around and hit that jammy with those glass packs with turn downs 😂

[@takeoffbands1255]

For the active single mid pipe which do you plan on trying out the resonated or non red they just come out with the resonated single mid pipe like a month ago im curious to how it sounds because I’m running vrsf catless down pipes and stock comp exhaust

[@bimmerboi_hutch]

I really think you should definitely get the single mid-pipe and the AWE switchpath. It's been my setup now for over a year, and bar none the best sounding setup on the S55 imho. I get complimented on the same as well...albeit I have pure's which deepin the note by a lot! Good stuff, excited to see wut you wind up with

[@eanhuston2426]

That's that grown man set up, not raspy, deep but effective for date nights.

[@TUNINGDONERIGHTMX5]

Hey thanks for sharing. I totally agree on the “thinning” effect of the EL. The Dinan x pipe in the M2C is sweet.

[@eugenebeaty4142]

I really don’t think you should bother with the single mid pipe

[@vk45dett]

Hi, was wondering if u have the stock gts burble for this setup ?

[@firasalbalushi3673]

Nice 👍🏽

[@raygotz1069]

Turn off the burbles, it will instantly sound better and more refined

[@jayy7267]

To make a s55 sound good single turbo it or upgrade turbos. S55 sounds so bad

[@letmeknow4167]

Akra slip-on with active equal length is insane

[@F80_Nick]

The Valvetronic system sounded good from their videos.

[@SaturdayWinter]

It's not the mid pipes, it's the muffler you chose lmao

[@ThicWhips]

100% was midpipes. Went single and it solved everything.

[@harraj128]

I'm running catless downpipes (non res), single midpipe and the stock zcp backbox and think it's the perfect setup

[@takeoffbands1255]

Can you post some sound clips I have the same setup just without the midpipes

[@vonfragyou]

I could smell the exhaust on the rear camera shots! It sounds good! Is the GTS Titanium muffler same as the BMW OEM titanium performance muffler for F80's? They don't look the same to me?

[@ThicWhips]

They are both titanium, however a bit different

[@NotAmir001]

Can u install a widebody kit on the 340i

[@rickpotter775]

I have stock downpipes, the AA single mid-pipe and DINAN muffler and it sounds really good. I actually took the EL mid-pipe off too because the sound wasn’t better.

[@ThicWhips]

Awesome I’m looking forward to the single mid

[@jaymarfernandez6491]

I have equal length non res w Dinan axleback. Would you say going single non res will make my exhaust note louder?

[@brianfortenberry1012]

Way better!!!

[@tvngo1]

Did the Dinan fix your rasp at 2k RPM?

[@ThicWhips]

Yes

[@vinanguyen5918]

Sup Thick

[@DadUsed2Skate]

Please get an e46 m3 and do this same research 😂😂

[@buildindian8169]

Bro, I told you before….H pipe, rasp gone , s55 will never give you that rumble I assume you are looking for … I am buying a v8 Audi for the sound …F80 for the thrill …

[@ThicWhips]

Already hadH pipe brotha. Rasp was there. Stainless muffler solved rasp issue, and I think single mud will give me the body I’m looking for.

[@buildindian8169]

@@ThicWhips I hope single mid work for you but I have tried several mods on my F80, now I am running vrsf ceramic coated cat less down pipes, secondary cat deletes , resonator delete with H pipe and stock muffler…still some rasp but I can live with that.. I see disappointment in your face bro but eventually you will get used to it…

[@ThicWhips]

Honestly I’m not really disappointed, to the contrary I’ve always been ok with the s55 sound. I just think I can make it sound better

[@buildindian8169]

@@ThicWhips enjoy the journey bro…now I am doing full suspension mods..Dinan, SPL, TURNER, the works … This car is trying to kill me so now I think control is the best investment…👍👍

[@ThicWhips]

🤝

[@The_Diesel733]

only thing that will fix it, is a V8.

[@ThicWhips]

I said I wanted it to sound better, not drive slower. 😅