Really well put together video buddy! The brass tip insert making such a change is mainly down to 2 things. 1. The tip has introduced a change in internal diameter, creating a small choke point. You can hear the interruption in flow on the cold start clip, where there is a slight "hiccup" before the flow corrects itself. 2. The extra weight on the end due to the difference in density changes the harmonic frequency running through the pipe, in much the same way weighted bar ends do on a motorcycle handlebar. You would get a similar effect, albeit less pronounced, with a rolled tip on the steel pipes, be it inwardly rolled/outwardly rolled. The brass pipes sounded much nicer than either steel option, giving a deeper, richer tone through my earphones. Not sure its worth the ten fold price increase over mild steel though. Again, great video, really enjoyed it. Would be keen to see other materials tested such as copper or aluminium, finances allowing. Keep up the good work sir. 💪🏻

I love the idea and would love to see a full brass exhaust

Wow the brass tips are amazing change

Thank you for making the time to make this great video

This video is going to cost me some money 🙈🤩. Thank you again for a great video. My neighbors are going to be mad😬😬

I like your english accent, but your compare videos are so much better than this ❤ Thx dude for your work!!

you are making very interesting videos! i love this experiments!

Hats off to you!!! One of the best videos I have seen in a while!!!!

The amount of work put into this video is incredible! I too was holding onto the edge of my seat waiting to see what the brass pipes sounded like. As unfortunate as they were, I think the fact that we've figured out that brass tips make a difference to tone and drone is excellent. At least through the mic, the pipes sound better than the mufflers because they have a deeper 'growl' to it. In person though, I DO know that what sounds deeper on the mic often is much dronier in real life. Excellent video, love your level of care throughout these videos. All the little details make the difference. You've even gone above and beyond to do acceleration tests. As for the difference in performance, I reckon it has to do with back pressure. With the TA Technix muffler you probably have the perfect amount of back pressure compared to the restrictive stock muffler, and then with the pipes you might have TOO much back pressure causing you to lose power instead. Just a theory but this could be the case.

Oh man. It totally makes sense to me. I think you are really onto something. Thanks for the effort. You rock man!

This video is gold. So much info you absolutely can’t go wrong ❤

I always get visible happy when I see you upload. My absolute favourite channel 🤙

Love your excitement & knowledge in these vids. So cool to see all your tests!

Man this channel deserves more recognition! This is such a blast watching you experiment with your E46!

Very in depth as ever Tim. Top work😊

These videos are the best!! Keep up the work

Another interesting experiment. Looking forward to your next video.

Jeepers man, appreciate your time. Craft, driving,recording and perfect editing. After watching this makes it clear what were the shiny thing on some harley tips...and good explanation in the pinned post. Effin cool work!

Thank you again for another great video brotha, you are doing so much for e46 enthusiasts, your videos are extremely helpful and very appreciated.

Another fantastic video as always. Keep it up ❤

Fantastic video, well explained and direct

Hey there, really nice video! Keep the good work! Greetings from Brasil!

This was a fun test. I installed many many many exhaust systems. The best sounds always came from the thickest/ largest diameter pipe. Ive even used an old semi driveshaft as exhaust. Everything I've ever put together changed immediately with the right tips. Thick double layered stainless tips have always been my favorite. But i like the brass.

Very, very interesting results. Thank you!

Excellent, entertaining and informative. Such a well put together video that this is the first time I have ever commented and liked.

Keep on testing! Your videos are priceless.

From my own personal experience: I had the TA Technix Muffler on my E46 320i with the M54B22. At first it sounded pretty much stock, but after a couple hundred to thousand kilometers of autobahn driving (basically a minimum of 3500-6000rpm constantly) it really burned free and was quite loud, and it sounded pretty nice. For a price of 180€ with a homologation in Germany (Teilegutachten) it was well worth the money! Edit: The fitment is tricky to get right, but you basically have to, for one, play around with the mounting system and adjust it so it sits flush and straight, and you can also twist the muffler a very tiny bit to get it to sit straight. I was sitting very nicely on my E46. The different length mounting pipes were miserable, I had to weld a piece of tubing to it to get it to fit, I had the same problem you had. Also I loved the different length end pipes, those made it look much better imo. In the end it was a bit finicky, but when you play around a bit you can get it to sit flush and straight!

Wow thanks for answering a question i had since forever

Another awesome video to see! :) Can't wait for next! Cool how the brass tips really changed the sound! And free flowing exhaust is always gonna be better, you never want any backpressure on a 4stroke, doesnt matter if its NA or turbo/supercharged.

Dude, I was waiting for the brass tips on the brass pipe test man! The thickness difrence seems to me like would definitely change the sound!

another amazing video, it’s always a good day when you upload! would love to see some testing with resonator 1&2 deletes with stock muffler and such :)

this is super cool thank you for exploring our thoughts for us

Wow We'll never stop to discover new things

I did that 40 years ago and it sounded great!

Really good video

My metal shop teacher was German from Germany, we got along fabulous he was a great teacher !

Maan I just ordered a muffler to empty it two days ago and now I see this video, almost perfect timing. Good video.

Interesting experiment for sure, thank you.

AMAZING video and nice WORK!!!

This is the perfect explanation of, what happens to sound in density/denser objects? The more density you have, the more sound makes it out of the hole than thru the side of the pipe.

I have to give you credit that video is a lot of work 👍👍

great test. I had never considered material types or using solid insert tips to change the sound. Liked, Subscribed and looking forward to more videos. I really want to try brass tips on my M6 now.

great video. keep it up! :D next comparison could be about resonator delete, small resonator and big resonator

The TA sounded really good..like it should have sounded from factory!! Brass made it sound almost more like E46 m3. Great video!👍

Had a copper straight through on a hemi straight 6. Sounded beautiful❤

Well made video great job 💯👍

Well done my friend!

The SS definitely sounds better than the MS, even if it's not any louder/quieter. I was pretty surprised by how much the brass tips made a difference all around! I want some brass tips, now! Especially since it matches my wheels, shift knob, etc. :) Thanks for all the testing.

Great video, there’s something also worth considering, the brass will be more sensitive to resonance, so tuning the length and diameter of the pipe is also a fun test you can do

Great test. I got a custom Magnaflow stainless cat back system on my Mitsubishi. And at first it was a bit raspy, but the mechanic said it would smooth out a bit when it gets a layer of soot in it, and this was so true, after a couple of months it had a different sound to it, a bit deeper.

Interesting. Nice testing and Results.

Amazing ,just amazing 👏

Amazing video! Very good

Super dope video. Keep it up 💯

This was really well put together! Thanks. Ive also wondered about doing thermal coatings like cerakote and or some of those insulating aero beads.

I once lived next to a guy that started building t-buckets in the 50s. He once told me that they would cut up brass beds for the pipe, and then string a piano string- I can't remember which, tight between two screws to get it to "ring" You already have some brass pipes...

I've always liked the sound of straight pipes I've got 3" stainless on my 01 TA after stainless long tube headers

Great job/video! I appreciate your endeavor!Would love to see a comparison on American V-8 setup.🤔👍

This is a great video! I'd wage that while there was just a little difference in sound, it was because you changed only the tip of the iceberg. If you had SS headers and all of the rest in brass, specially the curves, you'd get wildly different sounds! cheers!

one thing that would be nice is cruising at highway speeds. I think that might be where the brass options could shine because they are so good at eliminating drone.

Good video bro

interesting , nice vid :)

In my experience, putting a 3” tailpipe that’s at least 24” long, will deepen the tone of anything.

Thank you

Something interesting about sound / pressure waves that is likely the reason for the tips making a difference in the stainless exhausts is that if a pressure wave travels into an area with a suddenly smaller or bigger cross section it causes a difference in 'acoustic impedance' so some pressure waves can be resisted or bounced back by the sudden transition, so the fact the tips suddenly neck down and then flare out probably causes the fast and weak higher frequency pressure waves to be bounced back partially, reducing the high pitch droning sounds a little bit. Sorry if this gets a bit lost in Translation please look into it if your interested my explanation is probably not the best, keep up the awesome stuff and I hope your having fun :)

The pitch is definitely higher with the brass pipe! That’s really cool, I’d love to hear a full brass straight pipe

Really great comparison! Loved this one even though i wont be able to either use the intake stuff nor the exhaust stuff here in germany :) Would love to see a comparison with an x-pipe for the mid section! Think that might be really interesting for performance and sound Also great to see how much the channel has grown over the time! As always really nice quality video :) Keep it up!

you rock!

Just an FYI, if the valve muffler has had a vacuum line plumbed to it and the computer has been coded for it, the valve will be actuated around 5 minutes after cold start, from closed to open. The valve was meant to meet noise regulations on cold starts.

Great video! I’ve been curious about aluminum since it is light and less expensive than titanium.

The brass pipes makes it have soul (music) :)

Awesome video. I would think because the brass inserts had a lip on them it changes the sound more than the brass pipes. With the inserts your basically creating a whistle like device going from a larger "inlet"(base diameter of the exhaust) to smaller outlet(lip of the brass insert).

Awesome video as always!! Greetings from Guatemala, do this exact format with the catless headers and consider putting an X pipe in place of the second resonator thanks 🙏🏻

The brass had a cleaner less drone deep sound to it. I like it 👌

Virkelig informativ og gennemført video. Næste step er at forsøge Titanium. :)

those straight pipes in place of a muffler sounds good.

the brass tips look good.

THANK YOU VERY MUCH FOR THESE GREAT VIDS

You've been reading my mind

I really love this channel, I've learned so much from videos like these... I just want to say thank you for all the content you are putting out reacently! Really helpful!!! P.S. are you in need of an video editor and a thumbnail artist for your youtube channel?

Awesome garage :o It's crazy, when u try the TA one, looks like it rev higher than the stock one

I think, you forgot one test: Brass tubing with the brass tips, because the tips change geometry of the end an manipulate the sound. But I didn't expect the sound difference to be that great, between stainless steel an brass anyway.

Intakes make a difference in cooperation with a freer flowing exhaust, so this could be a factor in how the exhaust is working with factory intake flow.

Great video mate, well done! Really enjoyed the comparisons and didn’t expect the brass pipe, nice touch. I’ve recently gone back to stock w/ open valve from a stainless straight through backbox like the ta technix one and have to say it does feel like the car has lost some torque, not really sure why, was expecting the opposite given that the stock exhaust is probably more restrictive. It might just be in my head though as it’s a lot more quiet now.

Even when I was a kid getting my license I wanted a quiet car, I want to hear what's going on inside my engine

I really like the different pitch from the brass pipes. I know you already did the straight pipes, but I'd be curious to hear full brass exhaust tips from the back of a muffler, I'd love to see that on the stock muffler but you probably want to keep that intact, so modifying the TA Tecnix would be great as well

I was really hoping for a brass tips in brass pipes comparison too. But this video was still great. I definitely heard a difference in tone with each change. And now I know why the titanium exhaust I had that looked identical to the stainless, sounded different in my opinion, but my friends said it was the same. I should have recorded a before/after to prove it.

i actually really like the full brass. gave it a more "exotc" sound

this video is gold information thank you very much ! for curiosity i cutted open my stock 330 muffler and the piping for the valved side is very different than the side without valve . if you want to see the photos inside the muffler just pm me

Best tuning , weight reduction , probality, rear seat full ,And trunk clear, ,looks time 50-110km , testing

The only brass piping I had in the car was the last time I picked a brass up and I'm not talking exhaust pipes...

What changes the sound more is equal lenght or unequallenght headers and x/h pipes! You should test that too!

Nice job on testing this, very interesting

I would never have thought those brass ends or tips would have sounded different

I wouod love to hear a brass piped v8, i think thats where this mod will shine

Must try full brass headers and all Polished. Of course. And maybe some valves. Conected to some buttons on the wheel ?

Im assuming you changed the stainless steels resonance when you tapped the brass rings on. like holding a cymbal to mute it.

That exhaust sounds like my first car, i put a Bee R rev limiter. Video is in my channel!

I try to tell people this stuff thank you for demonstrating. I put new 2" thicker steel duals with aftermarket steel packs on my old 06 Mercury and its the best 4.6 2v sound in the world. Can you show why glass packs suck and to help people get better steel pack resonators free flowing exolaining velocity as well. Shake and bake brass pipes are neat

So nice to have a lift