FINALLY DID IT! I Straight Piped My Z4 (Backbox Delete)
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- Опубликовано: 1 фев 2025
- FINALLY DID IT! I Straight Piped My Z4
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Hey Guys It's Joel!
This video needs little explanation. I've been going on about getting my Z4 straight piped ever since I bought it over a year ago, and today I've finally done it!
I'm super happy with the result and honestly cannot believe how loud it is!
Hope you enjoy the video & now I've got straight pipes, you can give me some video ideas on what to do with them!
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Dude that sounds nuts!
It’s CHAOS
@@itsjoel In my 2003 Z3 3.0i I have primary silencer aka resonator and rear muffler with center muffler. So in total 3. Did you have mid pipes and center muffler still and only back box deleted?
Hi Joel,
This is my first posting to your channel. I finally did it - after prompting from you - my z4 exhaust is now straight through.
Amazing, amazing, amazing. I'm now reliving my teenage years when I put a larger exhaust on my Hillman Imp in Scotland.
I have finally settled in Northland, New Zealand after 40 years. Now in my 2006 Z4, I have thousands of miles to discover "World class scenery all within one small Country".
Cheers, John
I don’t wanna be that guy, straight piping is no cats no boxes. But, it does sound good though. Should get louder over the next few weeks as the carbon builds up in the new piping
CATALYTIC AUTOSPORT haha that’s fair enough, I didn’t know that! Maybe I should change the title lol ...
It doesn't get louder, it gets ever so slightly quieter and less pops as the fueling adjusts. It still pops a lot and still too much drone for me, I put a box in but it still drones :/ going up any slight incline or hill is annoying imo
Richard Dodd i fully straight piped my r32 and it was amazing on full throttle. Screamed on second cam. I have videos of it on my channel. It did get louder and the pops were less frequent but louder, flames also got a lot bigger aswell due to the unburnt fuel in the piping. But my god was it annoying up hills and just pottering around on cruise control. I could forgive it though for the noises it made
CATALYTIC AUTOSPORT may be on the r32 it's different but on z4 3.0 with cats in place it gets slightly quieter but not worth the drone, almost to the point passenger stops talking, roof up or down it's the same. Mine pops and bangs at any revs if I slightly let of the throttle, it does sound good though.
Removing the cats is illegal but idk maybe can bribe them to pass the MOT 😂
Got mine done last week, sounds awesome now, backfires like hell the best £100 I've spent matey, having the front box replaced for a less restrictive bespoke stainless one on Tuesday £120. Buzz the guy at a garage fabricated them from scratch.....I'll keep ya informed..
How was it? Looking to get mine done
Did they pass MOT fine I wanna cut mine off but don't want it to fail MOT
Finally! Been waiting for this moment aha, now that i have seen and heard the results , i can go ahead and do mine 😋
Go for it!
Man, just that genuine smile you have. That's why I want this car.
Good job bro! I have a Grande Punto Abarth and the backbox delete is a "must" for turbo-engines! I feel your excitement! Have fun with your beast!
I deleted my backbox (they call them mufflers in the U.S.) several years ago. What you are hearing now as to sound will not increase. My Z4 is an auto and the level of noise it makes on a highway actually quiets down a bit after the car is warmed up. But when I engage the steptronic manual it sounds just like yours. As for the drop in gas mileage, it is because you tend to keep accelerating a bit longer to enjoy the sound being produced. My first, least expensive, and most enjoyable Z4 mod!
Thanks for the insight dude! Yeah you’re right about my gas mileage, now I’ve calmed down a bit, it’s gone back to normal! Haha
So you don't regret it, do you? I'm very tempted to do this on my 6speed.
It's a relatively cheap modification. About $100 to do in the U.S. and it is reversible. If you don't like it then replace the muffler and try again later with a custom exhaust system.
Not at all!
Exactly
Whilst fitting a new exhaust to my 635CSi many years ago I realised I had the wrong size U bolts. had to drive it across town with nothing except the downpipes. Crazy loud. But nothing beats the sound of my mate's 7.2 litre Jensen Interceptor.
yep.... sounds awesome,,,, definitely gonna be one of my upgrades ,,, & for those who complain about the sound,,, thats why we take that crap off,, more sound,,,MORE BETTER !!
I deleted the backbox on mine a while ago but I recentely deleted the other silencer located around the middle and the pops are way louder. I will try to get videos of it and upload one to my RUclips so you can check it out.
Sweet, would love to see that mate! Let me know if you do get any videos 👍🏻👍🏻
It's Joel you’re the only RUclipsr that’s replied to my comments lol. But thanks man, keep it up I love the vids
Anytime Sergio, thank you so much for watching!
Maybe good for about 15 minutes drive.after that is annoying. I bought a box deleted z4 seriously thinking about putting it back
Hay Joel got a 06 z4 2.5i just took the back box of an put a couple dumpies on it an absolutely love it thanks for the tips m8
I just got my si a couple of months ago
I'm older but this is extremely tempting to get done to my zed...
You have finally done it and it does sound amazing!
Thanks dude!
It’s sounds absolutely awesome man!
Sounds good! You should try recording additional audio on a separate device in the boot (iPhone will do) then sync it with the video to give the exhaust sound a boost.
Thanks David, yeah I appreciate that the sound isn’t the best in this video, I just wanted to get a video out quickly! Am planning to do a video with proper sound, camera mounted by exhaust etc ..
how on earth have you made this car sound like that, incredible
Sounds awesome Joel. Have you ever been stuck on for having an altered exhaust system?
As deleting the backbox is in violation of Regulation 54 of the Road Vehicles (construction and use) Regulations 1986.
Just interested to know 👍
It doesn't. It still has CAT and mid resonator.
Oh word? I know what I'm doing @@lukebarber4904
What engine is yours? Any difference in power up or down? Was thinking of doing this, thanks
Great video Joel!
Cheers!
Hi Joel.
Great vid. Im tempted now.
Couple of questions please, how much more is fuel economy compromised, isn't anything over a certain decibel a mot failure and where did you get it done?
Ps. I don't expect an answer straight away cos your probably out right now tearing it up in this amazing weather!! 😎👌
Thanks
Mark
There is no noise limit in the UK on MOTs (or at all). The only thing that can happen is that it can be noted as an advisory. The Police can however pull you over either for disturbing the peace, or (more likely) for distracting other drivers with exessive noise; they could then technically impound the car; though it would be rare.
@@OsellaSquadraCorse thanks although I have recently been informed there is a maximum sound exhaust level of 82 decibels, a loud exhaust is indeed a mot failure, the police can also provide on the spot fines or worse still as you say impound the car.
@@markb9974 The 82db refers to the Type Approval requirement. Depends on the car age as to whether that is applicable or not (like seatbelts, cat, etc). The wording of the test is "Exhaust noise from the vehicle must not be unreasonably above the noise level normally expected from a similar vehicle with a standard silencer in average condition." so unless you have an especially diligent MOT tester who - voluntarily - checks the exact db of every car (which isn't required) then is largely is literally done 'by ear' and relates to how 'friendly' your tester is - and how well they know the 'normal' volume of the car. It would be a Major fail though, if it is exessively loud; though it is permitted to be louder, just not "unreasonably".
Does it pass mot??
Your terrace house neighbors will love it.
Haha - I’ve just moved and I hate having neighbours, never used to ...
I did that to my Z4 a year ago and i love it.
I’m loving it too 😉
I’m loving it too 😉
How much does it cost mate?
Sounds great. But does the modification affect your insurance premium ?
Nice car and nice videos you do... Not super serious.. perfect. On that note... I have a Z4 that I think you would love to review..and I'd love to see what you think of it.
Thanks dude! What Z4 have you got?
it's a 2003 Z4 3.0, supercharged, altered gearing, LSD, big brakes, smf conversion, full exhaust system and stripped out for maximum lightness.
That sounds awesome!
Will that pass Mot?emissions/noise ect....would love to do it to my own Z4 sounds great
I don’t think it affects the MOT, but to be totally honest, I’m not certain.
Im interested on doing this mod to my z4, but im worried if it will affect the emissions test, did you had any problem yet?
Nah, it doesn’t effect the emissions test as the Cat is still in place. The backbox is only designed to make the exhausts quieter
@@itsjoel Great thank you!! I will make the mod soon
@@itsjoel aka not straight pipes
I got the exact same z4! Where did you get the straight pipe I like the sound!! I'm looking to install something similar
put the top down sound test..
Will do - will try and get a camera mounted by the pipes too!
great vid. Have been a watching a few. Quick question do you know how loud that is because I am thinking of doing it to my 3.0 z4 but i don't want it to fail track day limits...
Hi bro, first of all, nice video and nice car bro! I have a question, the rest of the line it's stock or it have another modification?
😂😂 great sound Joel I am being tempted slowly to do it however I’m 53 not 21 am I to old to go for it 😂😂👍
You’re never too old to do what you want!
Do it, it's worth every penny....
I’m about to do this for the second time on my new Z4 but this time I’m getting the box gutted so it looks standard since I kept the backbox from my last Zed
what does it sound like gutted?
I have a 3.0Si Z4, sounds awesome, thinking of getting mine done, any issues with warning lights coming on after back box removal ????
Daz Morrill no, no warning lights at all 👍🏻
@@itsjoel Cheers, here we go then....Off with the back box !!
Sounds cool man does it effect emission's tests
Just did my 3.0si Coupe and think it's absolutely too loud and drones at highway speeds--seems much louder than this video. I'm adding a Borla muffler tomorrow to tame it down a bit.
Update: the little borla muffler made it 100x better, in my opinion. Louder than stock for sure, but respectable
So when I go get this done I need to say I want a backbox deleted?
Looking at buying a z4 around the same age as yours ? Any common problems to look out for ? Thanks
Hey Joel! Just started watching your videos because im about to buy one of these. I already got a E60 M5 and it sounds insane ofc. Now when I get me one of these and straight pipe it, you think it will bother me on the inside of the car? Like when driving on the sixth gear just for the cruise? Im thinking this because I probably wont get a hard top, the sound will leak in pretty much? Keep up the good work bro!
dont listen to this tool he has no idea what hes talking about.
Have you put the box back on yet...before your MOT...?
Enzo Del Bono no, it’s still off because it’s not an MOT failure
@@itsjoel really fancy doing it to my Z4 ...but I thought they were clamping down on noisey pipes..
Are you able to tell us where you have the backbox delete done? looking to get my 330 done.
Can’t remember off the top of my head, but pretty sure I say it in the video!
@@itsjoel Yes, you literally said 'TLB automotive' 40 seconds into the video. I should have just watched it again!
Haha, no worries dude!
Hi Joel, thinking of getting my z4 coupe back box deleted just like this one... Did the garage supply the steel pipes or did you buy a kit for them to do it? Cheers.
How do you deal with the drone sound
Sounds respectable.
Haha thanks!
It's Joel do update on her fuel efficiency after the box delete please😊
Ok, will do!
Great sound. Do you remember what size of pipes did they use?and where did you get those tips from?Thank you. Thanks to your chanel I am now happy owner of z4 👌
The straight pipes and the end tips what diameter are they 3" ? Or 2"5 please I'm planning to get my done myself
And what diameter of this pipe I will need?
Backbox delete only? Do you still have the resonators?
Question to Joel and anyone else that has deleted the backbox: What kind of tips did you put on? Mine is a 2003 3.0i 6 speed. Has anyone else done any other exhaust modification on theirs?
I recently deleted the back box in 2003 Z4 I put the original tips back on, My gas mileage improved
Does it pass the mot because I’m sure it doesn’t
That facial reaction is priceless...
What was the ball park cost of the work Joel? Sounds epic, loving the vids, keep up the good work. It will be interesting to hear how you get on with the fuel economy.
Only around £100! Doesn’t take long to do either - thanks buddy
Top! cheers
Got my Z4 a few days ago and thinking of doing this. Only thing that's making me reluctant is loss of back pressure. Did you notice any slight loss in power? Cheers
thats not a real thing. neither is his so called "straight pipes"
@@eightymopar yeah turns out it wasn't real. Had a custom stainless set up with center decat. Straight pipes usually mean straight from the manifold with no cats
@@Tokyodrift5000 yeah idk why people think muffler deletes are "straight pipes". and "backpressure" is a myth. an engine is essentially an air pump, and making it pump air out more effectively isnt going to hurt or damage it, especially with a proper tune.
ive been working on and building cars for over 20 years, longer then this guy has even been alive, mainly carbed with some efis scattered in there, and have raced both 1/4 mile and road courses. have ran everything from standard flowmasters, to open headers to glasspacks and everything in between.
Nice one, Joel. Do you get any droning now?
Yes it does drone, but nothing that can’t be covered up with a bit of music!
Sounds so good I think it's time to get a chip or tune
Yeah, the car could do with a bit more power!
Sounds a lot like a series 1 Jag E-Type!
I guess that’s a good thing! Haha
hi Joel, who did the work on ure exhaust? i'm being quote £270 by Powerflow Bromley which I think is excessive to say the least! could I get the details of the guys who did the work on your please?
Hey man, so is this just a back box delete on a stock system or is the whole system different? Would you go for a resonator delete also or would that be too loud? Mines booked in for exhaust work in 2 weeks. Cheers
I was looking at buying a z4 but the problem is I’m 6’4 do you think I’d be uncomfortable driving the car
I'm 6'3 and I fit OK in my 2006 Z4. Only issue is you'll sit a little high above the top of the windscreen when the roof is down. I love my Z4, way more room than most other roadsters for a tall person.
love your videos man, may i ask what your occupation is?
I work full time for a corporate video production company
Pimpin ain't easy
Have you found that sweet rpm range for the pops yet? Once you do you can make it sound like gun fires on your own accord.
Yep, I just tap the throttle around 3,500rpm and it’s pure gunfire
It's Joel Lol asbo! Trust me you never get bored of it.
Haha, it’s so addictive!
i have a 3.0i z3 and mines is catless exhaust and around 3.5/4000 it pops and bangs my neighbors hate so much haha
Haha good lad
This is 3.0 petrol ?
Just bought a 1998 Z3 2.8l and want to make it sound beefy. But im new to all this and am not sure the difference in stacks vs straight pipe and a delete is taking off the muffler or backbox.... but what is the best sound for the money? I want a good deal sort of thing ya know. Nice throaty sound with no ricing. If i take it to a muffler shop and get straight pipes instead of a magnaflow exhaust for 600+ dollars, what am i expecting to pay installed?
The cheapest most noticeable different you will get is by deleting your backbox, what I did and only cost me about £150. I’m not too sure how much different and expensive custom exhaust would sound, probably wouldn’t be as loud
Does it triggers the engine light (O2 sensor )?
No, thankfully!
How much did it cost mate? I am about to do with mine
Bloody sick!
Sounds amazing Joel, will it pass MOT tho?
🤔
Yep, not an MOT fail. Only have issues if you start messing around with the CATS
@@itsjoel which means its NOT STRAIGHT PIPES....
Nice 👍🏻
Tell me Joel, what are you paying on insurance for the Z4?
It’s around £1,000/year
It's Joel
That’s the only good bit about getting old...£360 👍🏻🤪
Haha! 😂
I must be even older £240 lol
John Smith
Well I’m 44.....please say you’re 90 🤣🙈
Is it good for MOT?
I did this to my e60 530i and it drove me crazy. I got some mufflers put on as it was getting too much of the wrong attention
Yeah it’s not for everyone, sometimes I love it, sometimes I hate it!
Nice video! and what a sound! BTW, could you tell me where I can find some good roads in the south east part of the UK? I'm going there for Goodwood FOS in a couple of weeks time and would love to drive some English country roads in my Z4.
The road down to Goodwood itself is brilliant! There’s so many others too they’re not hard to find down here! The A286 between Haslemere and Godalming is one of my favourites.
Joe my name is Jim Michigan USA I have A automadic Z should I take my box off mine?
sup, Joel.
tell me please, is that really loud IRL?? or just more sound and pop-out shots?
cause i have 3.0si and in stock muffler on low RPM sounds with little bass, like subwoofer lol, and it's cool, but quite little bit.
if i cut off muffler like you, will i get more sound only in high-frequency reving? or bass too?
can't explain in eng well, if you dont understand - tell me, i bring video of examples ))
Hey mate, it’s WAY louder at low RPMs and still much louder at the high end - but yes, you will get a ton more bass at low revs - like someone’s just turned the subwoofer right up! That’s what the annoying drone that people go on about is though but I think it’s worth it.
constantly more louder! if you get to 2k-3k RPM and feather the throttle you can get the pops and bangs until YOU decide to stop! got mine done a few weeks ago and feel like a school boy, hehe (IMHO doesnt sound STUPIDLY loud (still loud!) if you drive sensible! and switch through the gears quickly to keep the rpm at a lower level)
Any power loss at all? Really thinking of doing a backbox delete on my E92 330i
Nothing noticeable! The sound advantage far outweighs any minor power loss anyway!
It's Joel Probably balances out anyway with the weight loss you get from ditching the backbox. Is the drone bearable on long runs?
Haven’t done any long runs yet, but have been saying to people that you can just play music loud and then you can’t hear it, which is what I do anyway! Don’t think it’s too bad
It's Joel Ah nice, sounds great in the video, really bring out the inline six engine note
Yeah it sounds mental in person!
Seriously considering doing this to mine ;)
You should!
Hi Joel.
I follow you with your z4. I have just brought a z4 my self and done a fare few mods to it and only owned it for a mouth
Would you be interested in doing a review . Regards Shane
sounds cool man. congrats! I think you get a few extra horses too
Why not an electric Cut out instead so you can choose if neigbors should sleep or wake up in the morning.
Where did you buy the straight pipes ?
The garage that did the modification supplied them
Hi Joel, I’m thinking about doing the same to mine however i do a lot of motorway miles as well. Does it sound too loud for long distances? Im worried it may get annoying.
Hey Matthew, thanks for watching. It does drone at motorway speeds but I don’t mind because the noise when you want it is so good! + it’s nothing you can’t drown out with a little music ..
Hi, the check engine light turn on?
Hi
I'd like to do my coupe, can or can it be made so the original can be swapped back?
You could get some flanges welded on so you can bolt the muffler on and off. Or you could use electric exhaust valves, which will allow you to switch between straight piped and oem exhaust.
i should go to dyno after this change. Im thinking about do the same thing but im affraid of power loss
I wouldn’t worry, I haven’t noticed any change in power and a couple of exhausts specialists have said that it’s just a forum myth!
Power loss on this is a complete myth. I've de-catted/straight piped loads of cars and only every saw a benefit
Think about it. If high-performance cars wanted to increase HP don't you think they have massive exhaust systems with huge mufflers?
prontopac they do. Larger and clearer space means more air flow. More air flow means more power. Don't worry about HP... It's just a number ;-) plenty of other ways to measure a cars performance
omfg ! i like it , from France my friend ! I watch all your videos and I love, I have a z4 also in 3.0 if 265, the noise is monstrous, I will do the same, I would make a video on my channel! full of good things for you Buddy! will it be a problem for the technical control to have the intermediary removed?
Don't use your phone while driving.
Surprised you haven't been done.
Hi Jo, 12 years old z4, would it be too old?
Love it so much but friends advice is a very old car
Mine is 14 years old. I wouldn’t let it put you off!
@@itsjoel thanks jo, good video, love it!
Want to do it for my z4.. do you know how much it costs?
Only cost me £150
Sounds. incredible. I can attract the police as mine is at the moment. I don't. think this would be a good idea for me sadly. Does it improve performance?
MOT?
@joel pls answer me. What exhaust are you using?
Emil Kotsas it’s a backbox delete
@It’s Joel what kind of exhaust tip did you use?
I'm not sure, the garage that did my backbox delete had the tips already
@@itsjoel just got my 2.5i but its 5spd so I'm guessing I should delete the middle silencer instead of backbox cause I need that 6th gear to be able to drive on highway lol
I wish I could do this to my z4 but my dad won’t let me as he thinks it’s best to keep this car as stock as possible since he thinks it’s a “classic”
Haha, just do it in secret 😉
Don't worry about it. There will be plenty of time to do silly things to your cars after your dad can no longer stop you :P
Well said!
Definitely do the other reactions video 😁
my backbox is finished , dead, it havent the property of silence the sound XD
i must delete "flame arrestor" and "catalyst"
they 2 are the sound killers
Guildford 🤘🏽
how does this affect the insurance and mot?
Honestly Jack, I’m not sure!
DENY EVERYTHING .. honestly .. i brought it like that ... i didnt even realise anything had been done to it! ^.^
do you know if that is legal in germany? :D
Currently I have an entire exhaust delete...
Because my manifold has detached from it due to the flex breaking that joins them 😂
3:25
Two weeks driving and listening that noise, and u want muffler back. I know that ;)
Haha, we’ll see .. you could be right!