I think that’s because of the valves. The valves on bmws don’t fully open until exceeding a certain speed or rpm but you can get around with an exhaust module.
Running an X-pipe on a n/a V8 has gains because of the scavenging effect and will also def. help improve sound as well as a slight boost in power... I've tested it with and w/o x-pipe on one of my cars which is a 4.2L V8 Audi which still has cat-less downpipes + magna flow x-pipe + custom 2.5" piping w/ resonators deleted + aftermarket mufflers vs same setup w/o x-pipe and the difference in power especially in the mid range was significant enough for me to go back to running the x-pipe
man i didnt want to say it on camera, but i think before the x pipe it definitely sounded like two 17 year olds driving by in two 4 clyinder cars with muffler deletes.
Exhaust bro Brock's mullet is inspirational. So much better w/x-pipe. Almost sounds like it revs a bit quicker but don't know why that would be unless the scavenging is hugely beneficial on this car.
I have a LS Commodore with an x-pipe and I made my own h-pipe (amateur welder) and during making it, i tried it with just dual pipes like this BMW had and it was horrible. It droned like crazy and lost so much power. The h-pipe i made sounded awesome at low revs, gave it a proper old school roar but i eventually put the x-pipe back in. It just sounds better at high revs. Either way, you definitely need a cross over pipe.
Would love to see more videos like this as it's something I've spent a long time researching. I have an F15 x5 50i and recently removed the resonators and added an X-Pipe. It made the N63TU sound a lot more "exotic" in a way, not to dissimilar to the mid rev tones I can hear from this S63. Next step is to remove the rear suitcase muffler and either run a "turbo" muffler or just a vibrant ultra quiet resonator style muffler for a touch more volume.
I have to say we are pretty confident the worst part about this sistem is the small resonators. If it was my car, i would be getting rid of the stock downpipes first and maybe even put a stock rear muffler back on.
@@ZeroTo60Tube Yeah the lack of baffling would definitely be the cause of a majority of the drone/buzzing, especially without the banks being crossed over. Megan racing rear muffler would probably be a nice sporty middle ground
When I had my F15 x5 50i, all I done was remove the front resonators, didn't even put an X-Pipe and it gave it a great note, the guys at the dealer always commented on it. It would be interesting to see what it sounds like with different rear muffler/s
From what I've seen so far I think I'm gonna go with downpipes & a X-pipe with stock rear muffler on my X6M that should sound TUFF! 😤 my brothers got X6M as well & the drone is caused by that rear muffler setup. He put a Fabspeed rear muffler on it which is basically the same as the custom job. Caused it to drone at highway speeds.
Sorry Guys but you have to understand, WHY these M-Models with Crossplane V8s doesn't sound like those Types of Engines. To feed the two Turbos with as constantly even pulsing Exhaust Gas as possible (to spin up quicker), all the 4.4 V8 BiTurbo from M-Division (namely the S63) has Exhaust Manifolds which collects 4 even firing Cylinders across the 2 Cylinder Banks (possible by the Fact, that the Exhausts are on the opposite Side of each Bank in the Hot V). Completely different to the same Engine with less Power in the 50i Models (N63 Engine), where each Manifold gets Gases from the 4 uneven firing Cylinders of each Cylinder Bank. To add a Cross Pipe to a S63 Engine just for the Sound is senseless. X-Pipes normally are mixing uneven fired Cylinder Pulses of each Cylinder Bank to mix there Sound and to interference it and double the Pulses. In an Exhaust, where even fired Cylinders are already collected, it makes nearly no Difference. And that's exactly what you hear in your Video. I can't hearing any Difference between bevor and after. If you want really good Sound from a Crossplane V8 with an X-Pipe from Stock, you have to do, what I did 5 Years ago: Buy a Maserati GranTurismo. That's X-Piping on a whole different Level: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ftvIyYYlAcU.html
Well I've got rid of the two back box's and fitted the quad pipes and there is a good difference on bhp it has removed the strangeling effect of the exhaust not allowing the gas,s to come out after doing this I had a performance air filter fitted and then a remap and it's now rapidly quick and around 260 bhp.oh forgot to mention it's a 3.0 d m57
That is the worst sounding V8 I've ever heard, I'm assuming it has a flat plane crank, if it doesn't im baffled why it sounds like that. Even so it's a crummy sounding V8, noticably better with the x pipe but still awful.
On my 5.7l v8 tundra I tried a dual in dual out flowmaster 40 series and a super 10 ,not much sound but loud drone .I finally took the super 10 off and put a $22 x pipe in its place and wow! You can hear the firing pattern kinda like a charger hemi rt with nice deep tones .
I have a 7 series with the n63 and had alot of drone but when i removed the resonators and added the Xpipe the drone was gone and at highway speeds you dont even hear the exhaust only a fruity V8 when you punch it
you can really hear the turbos alot better. i have this engine but worse. this is the s63 i own the n63 and many parts are compatiable. 4.4L twin turbo V8
Do you think a x pipe would make any difference the sound of a n54, especially one with twins. Would love to see any videos on n54 exhausts that actually make the car sound better 😅
Its on my mind after this. However i guess the position of the x pipe from the valves is cruicial. If exhaust pulses hit the cross section out of sync or un even, it wont have the full x pipe effect/benifit.
Do us S63B44 owners a favor and throw in a split side manifold in the same style as the N63 has and see what happens, then you will get the real V8 sound, probably you will give up some of the early torque, 1500rpm vs 1750 but I have no idea what the end result on power will be. power cant be that much different, as Mercedes and Porsche (all VAG) use the split side manifold style on their hot V8's and they all sound like proper V8 cars. My 2011 X5M really is only missing the true V8 sound which the 50i has I am thinking about buying an used X5M manifold and chopping it up to split the sides Dont care about the marginal power loss, I want it to burble like a true V8
Did they mod the exhaust to make it quieter? I never heard one sound like that. My old f30 328i was louder than that. Sounds much better now but I think it should still be louder since it’s modded.
I kind of agree. Pre x pipe this was insane on cold start. Removing the rear muffler definitely made it louder, but it doesn’t seem to increase volume much. It’s still got the turbos and cats at the end of the day which will stop a lot of sound.
I am an owner of the M5 F10 with the s63 TT. heaps of power stock. unless you spend a huge amount to create a customer full exhaust with downpipes is ridiculous.
Huge difference in sound, it doesn't sound like a shopping trolley anymore! and I'd imagine the scavenging effect has made a noticeable improvement in throttle response particularly down low. In saying that, I do have two questions. 1: have you noticed any changes in the turbine behaviour with the X pipe, and 2: do you think it would warrant PCM tuning on account of the scavenging effect?
To be honest not really in the way it comes on boost. But the top end when the motor is really pumping some air. It’s absolutely more free. While a tune may make a difference, I doubt it would ever be noticeable.
Before the h/x pipe Sounds like when you blow through a kazoo as a kid definitely an improvement on sound I have the same pipe if yours was 3in(76.2mm) haha
I don't like welding the top of an exhaust pipe while it's still on the vehicle. It's such a pain in the ass, a beautiful weld on the bottom and the top looks like a kid was trying to learn how to weld by himself...lmfao.
a turbo acts like a silencer for the exhaust system , why they put a big muffler and resonator on it as well from factory i don't know, the less bends and a straight through system is all it's needed , putting a x pipe or balance pipe is meant to add to the scavenger effect from the pulse coursed buy the exhaust leaving the Piston , but on turbo engine you don't need anything but a straight out exhaust, twin 3 no resonator or muffler.
those mufflers are wack to on it. I run a 1o series flow master dual in dual out. and u wanna talk about v8 sound. !! id get rid of the mufflers on this thing and do a single muffler Dual in/out!! valve seals on deck I see
Imo if you have two banks ie a n/a or twin turbo setup there should be an x pipe. It’s going to take away that low and mid rpm drone and sounds more clean up top.
150$ 😂 Brock stop u know damn well that XPIPE in your hand is a $40 amazon crappy X-pipe!! AND to ADD TO THE "XPIPE" TALK A DUAL or DOUBLE XPIPE EXHAUST SOUNDS PRETTY AGRESIVE AND DIFFERENT!!
If you really want to understand what the x pipe does take one off the car and blow compressed air in to one of the “inlets” hold a piece of paper in front of the other “inlet” and it will actually suck the paper in.
That’s a great way to show it! Hey where’s your RU-vid channel showing this stuff haha. Honestly I didn’t realise about the scavenging effect until brock mentioned it
Can you honestly not tell the difference? It does help if you have headphones, not listen on your phone. Easiest way to tell is on decel. Huge difference.
@@ZeroTo60Tube Not dual X! just adding an H crossover pipe in front of the X at the mid section will give it a little burble sound. Most Maseratis come with inline H & X pipes with a resonator in between at the mid section. There are aftermarket dual Xs and dual Hs for mid sections, but nothing available with both combined.
I wanted that set up for the sleeper look if cops want to be messed up. I also found out it’s cheaper then most single turbo set ups. It would be cool to install that kit. I still have my stock ones but they are giving out.
@bavarianhero top mount seems more difficult to install, but once it's there, swapping turbos is easier. But with the bottom mount, it's harder, but idk how often does one swaps turbos
@@balkaraulakh5131 not me I tell you. I only install the silicone inlets and downpipes. Unfortunately I put back the stock cats because I started having issues. The index 4 are holding up well for what they have been through. Redline or 100% alcohol, it does clean out your valves but your car will smell like rotten eggs for a while.
Low mount is good for keeping heat out of the engine bay. Not a real option for RHD guys. Well the versions i have seen have a few draw backs with out the turbo is fed. However they work well on LHD cars. I know ken from wedge has a wicked low mount setup on one of his N54s.
Sounds much better with the x pipe. What I want is #s. Didn't he x pipe make more hp? I removed the muffler on my x5 50i and it sounds better that that m. I left the stock resonators in and I haven't noticed any drone. Then again I may be numb to drone after years of driving rx-7s with modified exhaust. I have a vid up of it if you want to check it out. I like how mine has that Harley blat to it but if the x pipe makes more hp I would do it.
In general, the N63 sounds more like a traditional V8 than an S63. This may attributable to the intake, exhaust or some other factor, but most of the work was already done for you by the factory.
@@FiveBoroNative I think the sound difference is due to the exhaust manifolds. The n63 has just one bank feeding each turbo. The s63 has crossover manifolds with 2 cyl of each bank feeding each turbo
Hi guys I have a 2011 x5m and I'm in need of better noise currently has a after market exhaust and downpipes was just wanting to talk to someone about it and wanting some tuning done also wanting some advice on what to do. Love the channel
Hmmm… I’ve got a V8 E53 and have been considering a h pipe installed where the central resonator is. Apparently a h pipe allows slightly more torque at lower rpm and also has a lower exhaust tone. Thoughts?
I mean definitely give it a go. I dont think it can make it worse. It seems the h pipe is going to give a more lumpy sound as well, which would probabaly go well with the m62/n62 engines
I removed the resonator on mine. Just did 2 straight pipes. I think for the effort/cost of the H, you won't notice any difference. The sound was night and day with the resonator removed and I really liked it. No drone on highway, etc. The muffler shop didn't want to do it and claimed it would cause problems with the engine-I told him I would worry about that! No problems at all.
These cars definitely need a crossover (H-pipe or X-pipe), but neither will get rid of that drone because of the hatchback body. I was a little surprised that you guys did not use a higher quality mandrel-bent X pipe, but I think you made your point. The next step is adding Helmholtz resonators to the exhaust to kill the drone.
Drone was slightly better, but not as good as i was hoping. It definitely sounds like its revving a lot easier, and the decel noise was a huge improvement. The weird buzzing it was doing on decel is completely gone.
@@ZeroTo60Tube i think he should remove the resonators at the rear it should not be much loader as the turbo's will muffle a lot of the noise and it should be a deeper note
I use X-pipes on my N/A V8s, never thought of doing so with turbos. I would actually expect power loss, but I could definitely be wrong. My understanding is its minor power gained/lost anyway. I think the biggest gains I see with v8 xpipes is a smoother sound, reducing drone. Now like everyone else, I need some magic solution to make my N54 sound better. Big single bottom mount might be that solution.
What would you guys suggest for a turbo I6? The new Jaguar/Land Rover AJ300 Ingenium's are great engines but there isn't much available for aftermarket exhaust outside of the F-Type. Working on planning a custom system on my F-Pace.
