F30 B58 340I XDRIVE HIGH FLOW CAT DOWNPIPE INSTALL | ACTIVE AUTOWERKE NO CEL GUARANTEED

Today I install a high flow catted downpipe by Active Autowerke for my good friend and one of my Jiu Jitsu Professors Scott! He is currently running stage 1 tune and added this downpipe to his 340i XDrive.
x-ph.com/activ...
/ boo5t_
www.boo5t.com/

[@simonromero4294]

Hi Chris the Active Autowerks downpipe for the b58 is IMO one of the top ones for a stock oem plus style, no CEL guaranteed and no problem with the emissions test either, sound it’s awesome. Finally someone did it on KZbin and obviously done by @ForcedInductionsStudios, great and clean job boss 👍

[@BOO5Tchannel]

Thank you and much appreciated!

[@scottappleyard9117]

Great video and thanks again for installing the AA downpipe! It’s awesome and really adds to the overall driving experience of the car. Definitely worth it.

[@BOO5Tchannel]

Anytime!

[@simonromero4294]

Hi Scott u found the AA Catted high flow dp for the B58 enhances the overall driving experience, but specifically any details in sound and performance in ur 340i? Thanks

[@scottappleyard9117]

Hey Simon. The sound is an improvement in my opinion. The car is louder and a little more aggressive on the cold start and under WOT. Performance is also improved. The throttle and responsiveness is better than it was before. I also like the no CEL guarantee and that the downpipe is EPA certifies and OBD2 compliant. I’m in NC where they hook up to the OBD port for emission inspection so that was big for me too. If you’re thinking about upgrading your downpipe, I highly recommend the AA catted downpipe.

[@simonromero4294]

Scott Appleyard Thank you Scott I recently installed in my car the MPPSK but was thinking to move along with the AA too. My best friend has the AA downpipe in his 340 And sounds perfectly nice

[@ifrancus9623]

Clear and informative video. I couldn't find anything about just replacing the O2 sensors. This was a very good substitute. Thanks.

[@BOO5Tchannel]

Thanks!

[@TheRabbit91476]

Love that grey

[@JustAwesome2020]

Good video Waiting for my down pipe to install it 👍

[@BOO5Tchannel]

Thank you 🙏

[@paull2868]

Wondering how the owner likes the Dinan intake. I just sold my MST intake because it was too noisy. Wondering how Dinan sounds vs. stock.

[@scottappleyard9117]

Paul L That’s my 340 in the video. I love the Dinan intake. While it does improve the sound, it’s a closed box so it’s not too loud for my taste. But for me, the performance improvement is what I like best. The car definitely pulls harder and the throttle is more responsive. I picked it up last year during Dinan’s Black Friday sale so I got a great deal on it. Well worth the money for me. I highly recommend it if you are looking for sound and performance improvement but not for something too loud.

[@stephens335i5]

Great video, but please don’t use a jack as your source of supporting the vehicle. Highly unsafe when you have perfectly good jack stands sitting right there. Other than that, good content.

[@BOO5Tchannel]

Good tip!

[@BOO5Tchannel]

i now have a lift so no worries

[@Steveindajeep]

Looking to do the same. Thanks for posting.

[@BOO5Tchannel]

Absolutely!

[@AmidArchibald]

Can you install catted downpipe on 340i without a tune??

[@BOO5Tchannel]

No

[@clifft7832]

How much louder is this with stock exhaust on a 2018 540i? I ruined my hearing with stupid car stereos, jet engines, and electric guitars, and I can't handle much more noise.

[@BOO5Tchannel]

No clue I’ve never heard a 540i with this exhaust. I would imagine about same as 340 so about 30% it’s not crazy loud it’s more for flow

[@Knight_F80]

Hello mate do u have any link where I can get a catted high flow downpipe for bmw 335i n55 engine please. Thanks

[@BOO5Tchannel]

Sure I use x-ph for most bolt ons. Link below x-ph.com/f-chassis-2012-335-sedan/

[@datcurtguy2363]

Hi mate great video, I installed mine the other week but didn’t know about the gasket to transfer over do I need it ?

[@BOO5Tchannel]

Yes I would use the gasket

[@scottjohnson8316]

Tell me....the DP to turbo connection. Is that a fairly simple connection? One that you just push on and tighten vband and it all cinches flush and airtight?

[@BOO5Tchannel]

Yes but the vband must be on perfect for the airtight aspect to work, basically will seat only if it covers all the way around otherwise you will have exhaust leak

[@ThatGuyNers1]

What’s the difference between catless race downpipe and high flow carted downpipe ?

[@BOO5Tchannel]

Catless gets more flow but it has more carbon smell to it and high flow still has a cat that removes the smell but just more flow. For power you want catless

[@MrRaylorscheider]

Dang, 1200 for a down pipe? IS that pretty standard to pay that much? Speaking just because I am unfamiliar.

[@BOO5Tchannel]

Yes some high flow catted are, they may have come down a bit by now maybe. But catless are cheaper

[@DemiseTLG]

@03:40 I broke the gray tab. How tf do I get it off the wire harness 🥲

[@BOO5Tchannel]

No clue man I am a hobbyist may need to ask a professional

[@hsuray1986]

How much labour time would it require to replace stock to high flow downpipe? Thanks.

[@BOO5Tchannel]

Depends on who’s doing it but 2-3 hours max

[@JE335]

I ended up going the cheap route for a stage 2 tune and went catless. I’m deciding whether to purchase a high flow catted due to the smell. I can smell something even with the windows up, although it’s not as strong as it is when my windows are down.

[@BOO5Tchannel]

Yes when I went with my first catless I lasted 4 days and bought a nice high flow catted downpipe, the smell was terrible. Now with e85 I do not smell anything so with BB kit I run catless again.

[@JE335]

BOO5T bb kit? I don’t plan on running e85, I may just stick with 93 octane. Did you ever smell it with the windows up? Maybe a light smell?

[@BOO5Tchannel]

JEazy big boost turbo kit, I never really smelled it when windows where up make sure your air conditioning is circulating and not doing outside air...

[@JE335]

BOO5T that is probably the issue... I think I have it set to the air outside. Thanks for the heads up, I’ll definitely look into it!

[@JE335]

BOO5T also I heard once you upgrade turbos, catless is a must. Any thoughts on that? I was planning to go to high flow catted since I’m not changing my stock turbos at all. Also while you were catted, were you more careful with burble settings? As in not making it aggressive?

[@carbonoxx]

do u need a tune after the downpipe?

[@BOO5Tchannel]

Absolutely

[@FQ1998]

how much flow has it compared to a catless downpipe / 95% ? Great video. Also what setup would you suggest me for perfect reliability and power on my 440i.? LOVE

[@BOO5Tchannel]

I would say a catted downpipe like that one is 70-80% more flow vs 100% on catless... for a 440i I would do downpipe, intake, and stage 1 or 2, that should be great gains with solid reliability

[@FQ1998]

@@BOO5Tchannel Thanks for you fast answer sir. I would like to raise two points. First is, intakes are useless ( for gains ) unless you are running a big turbo setup like you, dont you think ? Secondly, what supporting mods do you suggest aside from coilovers, plugs? I've been following your journey since your first video.

[@BOO5Tchannel]

Farouk Qaddoumi I like intakes for cool engine noises to be honest. Supporting mods after that is based on your goals, coilovers are expensive.. I would go h&r springs if you don’t track the car. Plugs are not from my understanding needed right away, you can change those when you do your next oil change.

[@BOO5Tchannel]

By the way thank you for your support I really appreciate it!!

[@curtomaru8077]

do b46 downpipe install video\

[@BOO5Tchannel]

I need a b46 and the pipe and I can lol

[@chavezdanny21]

Will a spacer work to avoid CEL on a catless DP? I’ve read a few things but wanted more answers

[@BOO5Tchannel]

No clue I think a tune is best way

[@carlsagan3065]

I don't understand why someone would change the downpipe without a tune anyways.

[@FastRedPonyCar]

@@carlsagan3065 The newer 3 series have locked ECU's and getting them unlocked and tuned is much more expensive than the previous gen. These catted DP's are showing around 20 or so hp gain on dyno tests so if you can get that much from a DP and another 9 or 10 from intake and then just slap a JB4 piggy back on, you'd have a really potent daily.

[@mohanada-k91]

Hello i have an f30 n20 328i Im looking to install a downpipe does it show any error code on the dash?

[@BOO5Tchannel]

Yes you will need a tune

[@mohanada-k91]

@@BOO5Tchannel stage 1 bootmod3

[@BOO5Tchannel]

@@mohanada-k91 that should work

[@freddy1000]

Im looking to get a highflow cat for my 340i do they pass most state’s inspection?

[@BOO5Tchannel]

Not sure we don’t have inspection so check with your state

[@dannyk3536]

Do these create a smell? I read it in a few places.

[@BOO5Tchannel]

Yes

[@adibees]

Is the hp gains on the catless way higher than the catted dp?

[@BOO5Tchannel]

A high flow cat is much better than stock cat and a catless is a bit better than high flow. I wouldn’t say way better but overall catless would be the best for exhaust flow

[@adibees]

@@BOO5Tchannel Thanks for the reply, I might get the catted then. Planning to just go Stage 2 max so I guess the difference in HP gains won't be noticeable.

[@ThomasYT-]

Did that car have other modifications that would affect the sound?

[@BOO5Tchannel]

No it did not, it did have m performance exhaust from factory

[@cardinalroma7495]

Can you tell me how tall the diameter of the kat is ?

[@BOO5Tchannel]

No clue it’s in the car but you can look up dimensions online for each brand I’m sure

[@alfrede.neuman8611]

Nice product, but $1,300+ for a catted downpipe?!? Nope!

[@BOO5Tchannel]

I agree it’s a bit much but some states need it and some people need some sort of protection when they have kids etc. so it is situational. Thanks for watching

[@5lakaiordie]

Not to mention if you go catless you’ll very likely throw a CEL and a bootmod3 license will run you $500 so you can code it out yourself and if you decided to buy a OTS tune you’ll be spending another $200+ per tune. Great video btw ! I’m thinking about running this downpipe for now since I am in California and emissions laws are very strict here.

[@alfrede.neuman8611]

@@5lakaiordie There are catted downpipes on the market that retail for less than half that. And just because it has a cat, doesn't guarantee it won't still throw a CEL. Besides....most guys swapping out their downpipes, are tuning their cars too. Its really not worth while, otherwise.

[@FastRedPonyCar]

@@alfrede.neuman8611 Which ones are less? Genuinely curious because I have a new M340i coming in a couple months and don't want to have to pay an arm and a leg to get the ECU unlocked and tuned.

[@alfrede.neuman8611]

​@@FastRedPonyCar ​ Right off the top of my head, both VRSF, or CTS Turbo Catted Downpipes are a less expensive option by comparison. About $500

[@natebrown7173]

Sound video?

[@BOO5Tchannel]

I’ll make one soon but it’s not too far from stock because it’s high flow, just a bit more tone

[@natebrown7173]

BOO5T I have a b58 and I can’t decide between a catless or catted. I have an m performance exhaust

[@BOO5Tchannel]

Nateydoodle depends on your goals, catted is more restrictive

[@WRAP_itude]

Great vid! Love the bright garage set up lots of light for the video! Purely for sound which is better option: catted high flow downpipe VS double resonator delete?

[@BOO5Tchannel]

@@WRAP_itude I like down-pipe, resonator delete to me sounds excessively loud and drones

[@Fourzerofatality58]

Will a catless downpipe with no filter always bring on the check engine light?

[@BOO5Tchannel]

Not if you use a tune, most tunes remove that.

[@JUSTOFTO]

Stock exhaust?

[@BOO5Tchannel]

Yes it is

[@JUSTOFTO]

@@BOO5Tchannel think it would sound the same on a 2017 440i?

[@BOO5Tchannel]

@@JUSTOFTO it should yes

[@JUSTOFTO]

@@BOO5Tchannel thanks for quick replies I’m subbing

[@BOO5Tchannel]

@@JUSTOFTO thanks!

[@ganuv]

Should of went catless, better flow

[@BOO5Tchannel]

Not a factor unless you go bigger turbo…

[@wordtruth6116]

It would have nice to see how you installed it.

[@BOO5Tchannel]

Same way other came off and I have other videos on b58 downpipe

[@emantsal1643]

This is the same motor setup in the new 2021 supra A91! Great video.

[@davec5237]

Cool, thanks for posting 👍

[@BOO5Tchannel]

Thanks man!

[@tinneth_12ta88]

Mentions Jiu-jitsu, instant sub.

[@BOO5Tchannel]

Oss!