The cost of brass piping for this mod... I salute you for contribution.

I have a recommendation for you. Take the brass pipes to an exhaust shop and ask them to make you a full catback brass system with an x pipe. I think it will sound very good like that

No wonder the brass sounds better... Why do you think they used brass pipes for those huge organs in churches. SOUND QUALITY!

I have never once asked what brass pipes would sound like.... But i thank you for this video. Very informative and satisfying my tism

I remember in my town there was an old man that used to ride a Honda CBX 1050 6-cylinder with a brass exhaust, that thing was ridiculously loud, cops would always show up. The pipes looked awful but the sound was just incredible

3:00 love the way u flipped back and forth btwn the 2 comparing noises first slowly then faster perfect thank u never seen it done so well !!

the first 3 seconds immediately sold me.

This brass exhaust must be what all those 350z guys are running

Would be really cool to see a part 3 to this endeavor….adding a brass x pipe to the system 😅. I do appreciate your time you spent and the effort put into carrying this test out, because like you, I often wonder about things like this and wish I had the skill to carry them out haha.

Bro you had me at the thumbnail 🤣🤣🤣

I don't know why but your accent makes this 100 times better.

This is amazing man! It sounds like pure music to my ears. This is the best straight pipes I've ever heard in my entire life, big ups on the new invention and i really hope this reaches the entire car community! 🙏🏻👌🏻

This is criminally an underrated channel.

I knew it was a bmw the second you turned it on. Sounds is unmistakable

Great work on the multiple sound clips. Different settings, scenarios - impressed with your thorough approach.

Wow, I can't believe how clean your car is underneath - it looks new! Wish my 330Ci was that clean underneath. Keep up the good work👍

Can you put on sunglasses and say "I'll be back"?

Another great video and I am actually surprised about the disclaimer about more power with straight pipes!! Appreciate your hard work and information!! Already looking forward to your next video 😍

I'm sure you'll never stop trying improve this car! Never change!

I have to say, that is the best exhaust video editing I have seen, like showing how it sounds inside and outside / at idle and driving and how you went back and forth a few times, good job, new subscriber now 👍

Love how the brass exhaust makes it sound like it is revving higher.

Stumbled upon this channel randomly. But agreeing to several comments here, this indeed is an underrated channel🔥

Mate your channel is underrated.. hope it picks up steam. Thank you for all the hard work.

love the accent and the commentary, keep up the good work bro 👍

Best up and coming BMW KZfaqr. I've binged a lot of your content and I love your work. Very good stuff here. Keep it up man!

Massive work to get this video done! Good job!

Damn! You really did it! :D I can tell the sound difference, not as drony and sounds better, but still really loud. Really cool to see! Keep up the great job man! And hope your health is good!

this video is so well done. I was surprised you don't have a mil subscribers yet. Perfect side by side comparisons!

back in the 80s down here it was used to have a bronze "tip" on diesel trucks (mercedes 1114, ford700, dodge 800 and so on). those suckers screamed high and loud

I don't know if I'm just a crazy person.. but I wonder what would happen if you had about a dozen or so 10mm brass tubes inside a larger tube as the tailpipes. Might be a dumb idea, but it would have an affect on the sound waves, creating more organized and shorter waves. Then i wonder about 100 or so 1mm tubes also stuffed into a larger pipe. Titanium also has a noticable influence over the audible tone in exhaust... I really appreciate you taking the time to do these tests because I wondered the same thing about brass after seeing some clowns connect a brass instrument to an exhaust and it sounded badass, like a trumpet. So i was looking for other videos that would educate me and discovered your channel just a week ago. On your last video i was left wondering what it would sound like doing the whole system in Brass so i was delighted when i saw your video today. And excellent job on editing the back and forth clips. That really made it easy to notice the differences between the systems. Well done, keep up the good work my guy!

props for following up on the last video, esp considering the tubing isn't cheap. big kudos and a subscribe from me!

Subbed after last "brass video" so worth it. Great work 👍👍👌👌 Love the full Brass exhaust. P.S. Cheap Upgrade next. But maybe the Full Detailing clean might get more views

i was going to do this in the summer!! Kudos! great idea!!!!! sitting here excited for the test xx

This was awesome and I’m cracking up at your welds lol good honesty!

This sounds AMAZING

I find it interesting how the brass seems to mute the higher frequencies and maybe also accentuate the lows as well. It does look like the brass has thicker walls than the steel, so that's probably a factor, but brass also has different properties that could be doing that anyway.

I would think the steel would smooth the pipe resonation before the sound waves even hit the brass, for the 100% experience, you need brass headers all the way back, the the tone would be more loud, than flair out the ends like two little trumpets to look cool. Good vid.!

Sweet informative video with a TON of sound clips. Thanks

Love these videos man keep it up!!!

You my good sir earmed a sub with the quality and delivery of this video.

love your vids man, so glad i discovered your chanel !

Absolutely phenomenal!

Found you randomly thru the youtube algorithm, Thank you for the contribution, hope this vid gets tons of views. Sure, I'll subscribe, this was an interesting video to watch. Well done.

You can tig weld brass very nicely, I believe as it’s a copper alloy you would also use helium gas as shielding. If you’re getting sheets of it also you could make a fully resonated and X piped system and tigged so it’s aesthetic as well as doesn’t effect the resonance like the mig welded with steel wire.

Awesome idea man, thanks for fronting the cost for this for us lol. I hadnt considered the effect of other metals on sound in exhaust. Of course, theres a reason for brass instruments, and different softness and resonance, etc. nice shop by the way!

11:45 Good to see you enjoying the process. I sure did. Cool project. Thanks for posting it. Have a good season 🤘🏼

A super service would good next for now, love your e46 content👌🏻

This was great, thank you! Subscribed!

I'm liking this before I get past the intro, what a interesting idea!

just what everyones been waiting for

Never thought of this, interesting concept.

Sometimes we don't know we need the answer to things and I'm glad others ask for me. Loved it. Xpipe!!! Brass

it's the collector quality that dictates a lot of the sound, the exhaust manifold and a high quality material on the manifold / collector is how to achieve the best sound. but this does prove that a good resonance material like brass can make a cool sound too. love it :)

I would love to see it clay bar and detailed. Thanks for taking the time to try the experimental exhaust.

I mean, there's a reason why brass is used in musical instruments.

Bro. You sound like a villain, love your accent in the manliest way possible... Awesome video, good job.

That actually looks awesome

Love your channel!!! Super cool to see a part 2 of the brass experiment! As you know, exhaust testing is totally a "rabbit hole". We may need a part 3. 👍 Your quest for a heavenly brass sound might be just around the corner. Like you mentioned, the true duals are losing some scavenging effect of a cross over. An x-pipe would serve this porpose as well as additional change in tone/ drone reduction. Hook this up to your schmeidmann headers. The stock catalyzed manifolds just don't give you much anything good to work with in terms of quality sound unfortunately. As you know, the first few feet of an exhaust is critical in terms of sound alone, especially in a stright pipe configuration. Headers make such a big difference. I am amazed at how much the brass changes the tone. I would say the resonance is even more dramatic than titanium. Might be worth going down the "rabbit hole" just a bit further, ya know, for science...😂 Send me your contact info. / email.

Very interesting, appreciate guys like you that try something new. The details in this video are great, from accelerating times to sound differences, just perfect. Would be interesseting so see what an x pipe or h pipe does tho this engine, I saw an old man from Merica who is master in exhaust systems on old v8 cars and one got me hooked on this… The perfect place to put a x or h pipe is, you draw with a crayon a line on the exhaust from the start to the end, the part where the crayon don’t burn is the place to put the x or h pipe . Greetings from Russia and Germany

Transfers more lifter noise and is the same otherwise. I salute you.

Truly wonderful how clean the bottom of your E46 is! As someone from Chicago, our cars rust so awfully because of road salt, I can't imagine seeing one in that condition!

Very interesting video - I would have never thought about using brass!😎

The title of the vid sold me. My thought was you were attaching pipe organ flutes to your car which tbh you're not far off from it. It sounds so interesting it could almost replace the entire brass section of the Vienna Philharmonic. 😁

Just found this channel instant sub!

Interesting concept. Dope video

And Maisteer said material didn't matter... Great one!

I love the the brass sound

I have a brass catback on my 2jz and it sounds amazing. great detailed comparison testing!

If you have the room for it, I think an equal length header from each cylinder into 2 collectors, alternating cylinder firing, each into its own brass straight pipe would sound awesome

I restored a 97 vr4. Stock as driven here is 9lbs of boost. Ditch the cats, a better intake and 21psi and these cars come alive. Dynos at just under 500 to the wheel on 93 and still comfortable and reliable. the 6g block was designed as a high mileage low care engine so adding the dohc and stronger heads, and a forged crank theyre the perfect platform. Just a shame they were forgotten

You asked what we wanted to see next. I think the success of your last two videos says it all: you should become the weird-material exhaust on KZfaq. Try bronze next time 😅 And try different thicknesses!

i think the brass pipe and insert sounded the best

I clicked this video expecting some American car or something, only to find a beautiful 330ci! I have a 330i as well so I was quite surprised. Great video

Brass admittedly sounds amazing in the exhaust.

Damn sounds so good!!!

These are such indepth and amazing videos man! I love watching you do interesting modifications as I slowly fix up my own 330ci. Any plans to do a lightweight flywheel? Id be interested in your opinion on clutch options for that.

I used to run copper pipe on my mini bike Briggs & Stratton. It produced green flames. Only visible after dark but cool looking.

Brass with inserts really delicious

I like your tool storage management

This is a great experiment. Thanks for doing it. I wonder if the way the brass was fabricated had an influence on it. Like how ever people fabricate brass horns, would that make a difference vs welding. Awesome video!

Super service and acceleration numbers after

Very Cool to see

very interesting! good video

how could channel of this quality have this little subs, well atleast I did my part and subscribed :)

bro the brass sounded the best for me i like the burbles and remember me when you are famous

I think you missed a primo opportunity to cut in a brass band sound track upon first start up with the brass 😆. Cool stuff man 🤙🏼

The brass definitely gives it a more exotic sound, wonder how it would sound going into a single pipe, or through an x pipe setup. Another one that would be interesting to hear is carbon fibre or carbon kevlar pipes.

Thanks for doing the inserts in the brass: my pick if not stock ;) The resonances ("drone") in the steel system won't be replicated in the brass purely because of the diameter difference. You can see this in your warm idle dB measurement and your performance measurement: the larger diameter of the brass pipes gives lower gas velocity at low (/no) throttle openings by the time the exhaust pulses reach the tips, which translates to lower sound pressure level in the low audible frequencies and slightly poorer torque before the VANOS is fully advanced. If you did a top speed run or some time attack laps all above 5000rpm the brass would probably be faster. The lower gas velocity overall gives the pulses more time to smear out and exit in a less coherent "pop", and unlike the steel (or a 4" fully hektik JDM hero exhaust in steel AKA drone box), the brass doesn't naturally reinforce the low frequencies. By my calculations at 2000rpm each of your twin pipes is delivering 2000/2/60*3=50 pulses of pferdestaerke per second. That's a bit too low frequency for most people to hear, but the second harmonic at 100Hz is right there in that annoying drone zone most people can. Hit your steel system with a spanner while using an audio spectrum analyser app on your phone and I'll bet you can get some peaks around 1-200Hz. Try it again with the brass and i bet the spikes are all higher up, and thus will move more on a running engine as the pipes find and lose natural resonances with the higher exhaust harmonics which change more as the ecu varies rpm and timing to hold idle setpoint/while driving => more "musical" exhaust tone. Even in your intro, the brass muffler delete is obviously brighter (despite it actually being both a longer and wider pipe: should be lower tone if same material). For future experiments do like instrument manufacturers (or at least repairers) do: solder/braze the brass with a blowtorch and plumber's silver solder: less fumes, better seal, wouldn't last a sprint race perhaps but that's not relevant for your tests. For reference the decibel formula is Power Ratio [dB] = 10*log10(PowerOUT/PowerREF) (in whatever power units are most convenient) so a sound that is +3dB vs some reference is twice as powerful (~"loud"). This means a 12dB difference is telling you one sound is 2^4=16 times as loud as the other. Brass pipes give a warm idle half as loud as mild steel. That's impressive.

I really like the sound of the brass pipes, at least through headphones, obviously a but different from in person.

Awsome video and the brass sound made it sound better than mild steel. Would be cool if you did a Carbon Fiber exhaust.

Now this is an interesting video!

I mean, maybe it's just my speakers on my phone but the tone of the brass sounded better than the steel. Loud as shit for sure though.

Brass sounds great

Sounds like it revs higher with the brass which is always a plus

Great video , I’d never seen or heard of brass exhaust pipe. There was a guy in Troon Ayrshire GB that worked with E-type jags old 1930s RollsRoyce etc and although I didn’t actually see 1 I was reliably informed he had full copper systems on some of his vehicles for better sound. Hope that interests someone

Great video again buddy! 💪🏻 The mitre cuts & mig welding definitely give a more harsh final sound, as opposed to mandrel bends w/clamped slip-fit joints. Hats off for trying the welding yourself, brass is incredibly difficult to weld at the best of times. Silicone bronze mig wire must be awful. 😂 Incidentally, the sickness you experienced is often called "Galv-flu", as most people get it when welding galvanized steel. Its caused by inhaling vaporized Zinc, and can be a terrible experience. You may have noticed white "floaties" that look like a cross between spider webs and smoke, floating in the air after welding. Zinc has a much lower melting temperature than the rest of the parent metal, so vaporizes very quickly when welding. Best advice is to drink plenty of milk whilst working with it, as this will help remedy any symptoms. Finally, (sorry for the essay) your cinematography & editing is fantastic, and your thumbnail very professional. All of this, on top of you doing this in what i assume is a 2nd language, is nothing short of astounding. Great work my friend, keep at it. 💪🏻

very good👏

That is one clean undercarriage of the e46 👌🏼

Brass sounds like a different car, it sounds nice!