HOW TO DELETE SECONDARY CATS (FOR FREE) // BMW N52

Today on JD Cars, Sam and I are sharing with you the process of decatting his BMW E92 (this video was filmed over the winter holiday break). This is a very simple and cheap way to achieve a louder exhaust note! We were originally considering “deleting” Sam’s cats--cutting the cats out and replacing them with pipe. This seems like a good option until you encounter the angle at which the cats are welded in. Thus, decatting was the easiest option for us, and I think it worked out well! I hope you enjoyed the video! Thanks for watching. Please like and subscribe for more BMW content!
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[@KurumaDesigns]

I would weld in straight pipes instead and sold the cats to someone that buys cats

[@nox_chan]

I'm so happy I live in Texas, that rust is unbelievable

[@Rnfjaydee]

Thats not even rust lol thats just some surface rust come to canada where we get rust holes lmao. Easy way to avoid is under spray which is clearly something he didn’t use lol

[@evangreen4164]

I live in wisconsin and it aint even that bad smh

[@eta24]

Problem I find living in north Texas is sometimes we get cars from Houston that have been in hurricanes so you get rust from unexpected places

[@Arrozconchopsticks]

That's nothing..

[@WayToManyAssassins]

Bmws don't rust that bad

[@davidlewis9414]

Best video ever!!!

[@diamondbackpeakMTB11]

I’ve done this too, cut once by the flange . And once more right by the cat. You can get the cat from one side.

[@aidankehoe1]

How did you get around the skid plate? Or did you remove it?

[@davidlewis9414]

Do you guys know what diameter the 135i exhaust mid pipes are? Looking to do a res delete and 2nd cat delete mid pipe system keeping the stock dps and the valved exhaust. Thoughts?? Cheers guys

[@dragosrmn9400]

Just a heads up, wear respirators next time, think of all the soot those filters collect that you get exposed to.

[@bimma.]

I have to replace my catalytic converter check engine light came on great tutorial video

[@123456bmx]

The secondary cats have nothing at all do to with your check engine light

[@krispytoast8804]

Did this work? The only reason i would think 2nd cats would cause a cel would be if they’re clogged, they’re after the o2 sensors so they shouldn’t affect anything.

[@Welchfabrication]

hey jd! is it 2.5” or 2.25” from the res to the muffler on the n52? aswell if you know res to cats?

[@JDCarsChannel]

2.5” res to muffler. You can achieve both by cutting the res / cats out and replacing with straight pipe. Or you can cut them out, hollow the cats out, and reinstall them

[@zappyraccoon5744]

what state are you from? and did you pass emissions with them being gutted?

[@brycebaker3066]

About to do this to my car. I don’t have access to a welder tho so I’m wondering if you think this will work. Unbolt the pipe from the headers then cut both off the cats on the side closer to the rear of the car. Then I will have that piece off and will be able to take all the stuff out of the cats from one side then bolt one side back to the headers and use 2 clamps for the other side

[@JDCarsChannel]

Yes! That should work with the clamps, just might be a bit more time consuming to get the material out

[@whohan6450]

What about the primary cats off the engine? Could the same thing be done to those?

[@JDCarsChannel]

Yes, or they can be replaced with catless downpipes

[@huannguyen3436]

Good shit guys

[@JDCarsChannel]

👊🏼🔥

[@nitrocell9287]

Whats JD garage? Japanese Domestic Garage?

[@KingOfTheFuds]

You realize these things could have been sold for 4-600 bucks? Could have bought an entire exhaust.

[@joeljasmin9982]

If what you're saying is true this man is dumb asf. Even if for whatever reasons you need it to look like you have secondary cats, you can buy FAKE ONES and still get a nice chunk of money.

[@colton_williams8520]

full exhaust kits are 1000 +

[@fescoti6851]

Openminded man 15

[@ryguy1954]

Do you have to tune the computer if you take them off and straight pipe them or will it be fine?

[@danielgeorge8871]

Secondary cats don’t have sensors. You’ll be fine taking them off

[@jesssejames6872]

@@danielgeorge8871 what I never knew this thank you

[@My-crown-heavy]

@@danielgeorge8871 I had removed my secondary cats and I have codes for lack of catalyst efficiency and that the car is running lean due to the lack of back pressure my car is creating

[@wass.s3001]

@@danielgeorge8871 somehow I still had a check engine light when my secondary cats were removed…then I put them back on few months ago and the day after the check engine disappeared

[@danielgeorge8871]

@@wass.s3001 within the 2 years I’ve typed that comment I have learned that there are o2 sensors in secondary cats as well lol

[@carlsagan3065]

I always feel the need to replace everything when I do this. I cant bring myself to put old pipe back on the car. Call me crazy. Just can't do it.

[@dflex4180]

crazy

[@Arrozconchopsticks]

It is nice to look under there and see that it's all new.

[@Har1mo]

Clever savior 97

[@thegamesbond-0073]

Nice video, but if you are cutting the exhaust before the flange anyway, you shouldn't need to cut twice next to the cats. One cut next to the cats would have been enough to get out the material. Or am I seeing this wrong? But again, doesn't really matter, thanks for the video :)

[@JDCarsChannel]

That was because the flanges were extremely rusted and the exhaust could not be removed without making the second cuts

[@Icepressa]

@@JDCarsChannel actually no you could have cut both sides before the flange and removed the whole back section of the exhaust.... mine was rusted the same way

[@Icepressa]

@@JDCarsChannel another idea would be to put a reciprocating saw right down the gasket on the flanges threw the bolts then hammer out the studs and replace with bolts I do this on all N54 DPs

[@GabrielSTEFAN943]

The secondary cats meaning the actual cats that work when the engine is not cold anymore, right?

[@JDCarsChannel]

I believe so yes

[@norbi3017]

Does it smoke after gutted cats?

[@JDCarsChannel]

Nope : )

[@skinkly]

My secondary cats don't have 2 its only one

[@zoh2615]

do you get any check engine light once they’re deleted?

[@chrischambers7103]

Not unless it was already tuned.

[@aimized1460]

No you do not get a engine check light.I own a 328xi 2007 I deleted both of my secondary’s yesterday no engine light. Why you may ask ? Explanation is very easy the secondary cats do not have the 02 sensors. therefore once cut out it does not trigger a engine check light. However primary catalytic converters have 02 sensors therefore if you cut out the primary it will trigger a engine light as the amount of air is not being measured/detected.

[@aimized1460]

@@chrischambers7103 if your removing primary cats it will trigger a engine check light as there is 02 sensor slots built into the primary’s. Only way to remove the engine light would be to tune it out with a option for “catless down pipes”. Again if secondary’s catalytic converters are cut out they do not trigger any sort of engine light. It’s if as nothing happened to your car but it got louder. Cheers man and don’t relay on people’s information from a KZbin comment because half of the time they don’t know what there saying. Proof is right here man.

[@whohan6450]

Does it really matter I mean, if it's a Beemer the light will probably always be on anyway 🤔 😂

[@tattoo_stylez420]

@@aimized1460 I have a 2006 bmw 330i and there is two o2 sensors before the secondary cat and those will trigger the light to come on if any of ur cats are bad or missing , only way the light won't come on it if u put a spark plug none fouler spacer on both down stream sensors.

[@davidpineda645]

I straight piped my 325i! Sounds great way louder than my freinds nissan 350z

[@JDCarsChannel]

Awesome hahaha

[@breezy0954]

Hey bro did you delete the catalytic like what he did

[@davidpineda645]

@@breezy0954 Of course! From headers down

[@lifeclips3329]

@@davidpineda645 what happens if you delete the front cats without a new pipe lol

[@SitDoWnBhumbl3]

Does doing this add any HP?

[@jtdragon9]

not without a tune

[@alessiourban181]

Does it throw a check engine light ?

[@angelmendoza7402]

Not my video, but it shouldn’t since theirs no 02 sensors there to determine air/fuel ratio

[@darksidedemond2bean825]

The installation stuff is platinum very expensive should keep it

[@x343ngamingx2]

I cut everything off but the main cat in my X3 it’s so loud for a early 2000s suv it confuses everyone around me 😂😂

[@JDCarsChannel]

Hahahah I always wanted to try that with my X3

[@x343ngamingx2]

I couldn’t find a exhaust for anything under 2000$ so I just cut it all off welded a 2”5 inch stainless steel pipe all the way back with dual tips on one side. If you rev up enough or do a pull sometimes it pops an bangs 😂😂

[@GabrielSTEFAN943]

Is there any disadvantage to removing secondary cats ?

[@HELP_I_HAVE_NO_SKIN]

better airflow

[@JDCarsChannel]

Some argue the lesser back-pressure decreases power but I don’t believe this to be true- and if so, the difference isn’t noticeable

[@GabrielSTEFAN943]

@@JDCarsChannel Oh okay. I was actually asking emissions wise and stuff like that

[@dickjohnson7845]

@@JDCarsChannel Back pressure is a myth and not well understood.

[@michaelbarry9700]

Imagine destroying 700 dollar cats to put them back on.

[@AutumnsAdventure15]

Imagine being that stupid/ignorant in the first place. Life must be very hard

[@dirkvanviersen671]

They pass inspection they have to on the car

[@johnnyjohnz1992]

does it have a bad smell ? after this

[@JDCarsChannel]

Because we only did the secondary cats, it wasn't terribly smelly. If you delete all cats it will be a bit smelly

[@johnnyjohnz1992]

@@JDCarsChannel thats what i thought i just received an e61 with the n54 with secondary deleted and it smells a bit

[@user-ct3ig7kh2v]

Smart mother 50

[@alexwalsh31]

You should have just gone straight for resonator delete bro. Then done 2nd cats if you need to. Ive got N53 330i sound is epic. The total sound deadening is the resonator. I also have a custom 4 exit like you get on an M3. Goes through a big open cylinder which makes it even louder. Car sounds like a motorbike now.

[@jerrydestin6774]

Hey I was wondering did it throw any check engine lights when you did that. Just wondering thanks

[@alexwalsh31]

@@jerrydestin6774 No! I took it to a proper exhaust place Deutsch Tec in Milton Keynes England. Had some suspension changed too so that threw a few engine warnimg lights but they used there compuer thing to get ride of it. Ive previously had a muffler delete and the dual pipe turned to a quad. Be ready for the exhaust to sound fucking unreal once you take out both Cats keeping primary. Its like the devil is coming for you. Such an exotic sound these engines are very under rated. Litrally sounds like a 911 thats has a sports exhaust and not the standard thr GT2. When you do exhaust work to a 911 they are even more crazy. Similar engines big 3.0lt Na lumps. The porsche engines are of course Flat six but all around 300ish BHP basically a tuned version. The E46 3.0 straight six is very similar in performance to the 911 engines if bot better than some some of the older ones

[@WaleedWahidi]

Forget doing this, its a huge waste of money. If you want to delete your cats, replace them with regular pipes and sell the cats, the sell for hundreds of dollars used because of the material they are made of. I've been offered $500 for my cats off my e93 328i. Rather then it being free you will actually make money but be warned, in canada it will not pass safety without the catalytic converters, and most other countries i assume aswell.

[@marcholler4047]

I have a 09 128i N51. Muffler and secondary cat delete. Its way louder than this. Everyone says they here me coming.

[@skinkly]

Also why do you have a bunch of bots in your comments

[@quantumx9924]

*Handles exhaust material with bare hands and no respirator* "Lets go to lunch"

[@caybear_official3907]

🧐 you said free but had to go buy this an that to get it done 🤣

[@JDCarsChannel]

You have a point 😂

[@theplaguedoctor142]

Will this even pass emissions anymore? I'm looking to have a BMW I can actually drive, man

[@justinbp6198]

Real car ppl never pass inspection.

[@autohut3720]

These cats don’t have any sensors monitoring them so it will pass emissions just fine. And it looks stock since he reused the pipe so it won’t be noticeable

[@jayzoldyck7420]

@@autohut3720 no the fuck it wont

[@phillipwalden8714]

I have a 2008 BMW X3 3.0is I’m thinking about adding exhaust Headers with straight pipe or mag flow exhaust 1: will I see a difference in power 2 how do I delete service soon lite. Do you where I can get header made and put on

[@coreyhardy863]

Lol take everything out I did

[@zxz1357]

park ur car in london for an evening and some nice people will delete your cat for you.

[@JDCarsChannel]

Hahahaha

[@haluji1426]

Gentle duck 99

[@king_of_savagery6289]

Those cats are worth like $200-700 a piece when you scrap them. It has platinum in it. That’s why.

[@dougfurniss6618]

If your going to do a video about sound, you should use a good microphone

[@SeeJojoSenpai]

that stuff is made out of platinum guys

[@dildoshwaggins1017]

our lungs left the chat

[@Salpeteroxid]

@@dildoshwaggins1017 That's asbestos lol.

[@dildoshwaggins1017]

@@Salpeteroxid search for platinumdust harm.

[@dakotafloyd5718]

Its called platinum

[@user-qy9ex5ut4v]

Dirty elk 87

[@rikuperry2792]

Catless headers and leave the secondary cats.

[@lunisic]

Im gonna leave my rusted out flange with missing bolts and worry about doing dumb shit instead 🎉

[@seanwilks7712]

Really hope you replaced that sorry little exhaust tip.!

[@JDCarsChannel]

I did! Don't worry hahaha

[@seanwilks7712]

@@JDCarsChannel nice.

[@theeasynick467]

Poetic duck 47

[@matthewmoser2090]

mother of god. horrible lol. cut out the stock res and weld in a vibrant.

[@seanlowrey7696]

check out what I did to my N52

[@seanlowrey7696]

oh wrong channel its called "SPEEDY-COUPE"

[@thejokerking952]

N52 engine are really good cars don't get rid of this car

[@user-od9qx8uy3h]

Pure girl 98

[@user-by5bi3ue2i]

Openminded boy 43

[@fredfrederickson]

?

[@naticruz7207]

( Free )

[@Zharsergey]

Could have sold the cats for good coin instead of just hollowing them out.

[@aimized1460]

I understand you taking out the secondary’s cats to get it louder as i did it yesterday also.but What I don’t understand is why on earth would you destroy the valuable ceramic material inside of the converter ????? And than proceed to put them back on like wtf I have never ever seen what you just did…. You basically threw away 400 or so $.They could be anywhere from 150-300$ each… a metal pipe could of been put where the converters were for roughly 25$. Instead like I said before you proceeded to throw money away, terrible advice.FYI yes the martial inside of the cat needs to be intact otherwise nobody gunna want to buy a bag of dust. Jeeez man

[@JDCarsChannel]

We were young kids and didn't know! Hindsight is 20/20

[@agomez9698]

@@JDCarsChannel smart answer, I would have done the same in my 20's, I know better now.

[@drifter9425]

Would have been way easier to just cut the top off and leave assembly in tact

[@dannyr3346]

Sounds like a waste of time. Stock af sounding.

[@gregshoopman6369]

Shoulda sold those for 500 bucks

[@JDCarsChannel]

Lol true. Hindsight is 20/20

[@Icepressa]

You guys do realize that you just lost $200+ by doing that, I took mine out and sold them replaced with a normal pipe why would you do that when a pipe is basically free.....

[@JDCarsChannel]

Hindsight is 20/20

[@billynote1025]

"for free" huh

[@illyrian5785]

bro weld a fuckin pipe don’t destroy 700 dollars cats

[@notmyhandle88]

You want sound? Catless headers. Res delete will give you rasp, will make the N52 sound like ass

[@itsreverse4237]

I have the performance exhaust which comes with a res delete and it sounds amazing

[@matthew1209]

I have a res and muffler delete on my n52 sounds amazing not very raspy at all and no drone

[@Nate-ek8qk]

@@matthew1209 yea this dudes talking out his ass i have the same setup

[@matthew1209]

@@Nate-ek8qk lol, i might get a secondary cat delete too

[@Nate-ek8qk]

@@matthew1209 hell yea just scheduled an appt to get that done next week, just need to put in a k&n drop in filter, charcoal filter delete and tune it 🤙🏼

[@dabzik6521]

first tip buy car lift

[@JDCarsChannel]

Facts 😂

[@feascoli4098]

Openminded man 15