CTS Turbo Catted/Catless Downpipe Installation on BMW F30 335i N55 EWG RWD | Complete DIY Guide

In this video I show I install a CTS Turbo high flow catted downpipe on my 2014 BMW F30 335i with the N55 (Electronic Wastegate)! Mine is a 2014 so it has an electronic wastegate that requires a 4" downpipe. 2013 model 335i's have a pneumatic wastegate that has a smaller 3.5" downpipe. However, the process for installing either downpipe is pretty much the same as I demonstrate in the video. Just make sure to do your research and get the correct size downpipe!
NOTE : I am not a professional, certified mechanic, or an expert. I do this as a hobby in my free time. Perform this job at your own risk!
Part Numbers (4" Downpipe):
Top Downpipe Clamp 18307606136
Bottom Downpipe Clamp 18307620349
Turbo-to-Downpipe Gasket 18307581970
PRODUCT LINKS
CTS Turbo 4" High Flow Catted Downpipe (EWG) www.ctsturbo.com/product/cts-...
Clamps/Gasket for 4" Downpipe
Top Downpipe Clamp www.fcpeuro.com/products/bmw-...
Bottom Downpipe Clamp www.fcpeuro.com/products/bmw-...
Turbo-to-Downpipe Gasket www.fcpeuro.com/products/bmw-...
Other MODICATIONS
CTS Turbo Air Intake www.ctsturbo.com/product/cts-...
CTS Turbo Charge Pipe www.ctsturbo.com/product/cts-...
CTS Turbo Front Mount Intercooler www.ctsturbo.com/product/cts-...
Gloss Black M-Style Grills amzn.to/3ybhVJx
Carbon Fiber Front Lip (Suvneer) www.suvneermotorsports.com/co...
BC Coilovers coiloverdepot.com/collections...
Instagram / e90hallenb

[@8l4436r]

🙏🏻 you saved me a headache trying to find the correct turbo to down pipe clamp, thanks!

[@InlineSixAuto]

Glad I could help!

[@DarkenedRez]

Mine is leaking bad idk what clamp to use

[@derekyien3765]

Awesome video. You gave me the courage to do this myself. I’ll just need a 3 ton jack instead of my 1.5ton 😄

[@scott331]

Great job man! Your video is very detailed with great in-depth details on every step and aspect! I just Subscribed to your KZbin channel

[@InlineSixAuto]

Glad you found it helpful! And thank you for subscribing!

[@jeremygong4190]

Beautiful! Absolutely beautiful!

[@johannyrodriguez5730]

yeah once you get the tune it'll definitely make a difference, don't know if your interested in a muffler delete but sounds great but good job on doing this yourself

[@swank2855]

Putting mine on today✅

[@korylewis7858]

Great video brother awesome. Thank you.

[@TJohnson540i]

2Mine is a 013 335i F30 N55 Excellent job!!!!! . Just ordered from BMP Tuning it's a Catted VRSF I'll will be installing soon. Your video is excellent diy, I may even attempt it myself.. You had one of the easier installs. I heard if you use more washers on the O2 sensors you could eliminate the check engine light from activating.

[@InlineSixAuto]

Thanks! I tried my best to make it detailed so anyone could it themselves. Also with the O2 sensors, I haven’t heard of that working but regardless once you tune, it’ll go away.

[@MiPhoneRepairLLC]

Sounds great thanks for the instructional video I can’t wait to get my downpipe.. maybe for a video before doing an axle back exhaust try a resonator delete. I did the resonator delete and it sounded better, not a huge difference but kept that stock exhaust note and added some burbles and a little deeper sound.

[@InlineSixAuto]

That’s actually a great idea. I might do that instead. I wanted to keep the ability to open and close the valve while also having a moderately loud exhaust sound. If it sounds good enough with just a resonator delete and Downpipe, getting a whole new axle back exhaust would be pointless and expensive for me. Thanks for the suggestion!

[@sergiochavez6491]

Resonator delete and down pipe w stock exhaust n 4in tips honestly sounds better than getting a exhaust

[@dontriskett8098]

I really struggled getting the v-band clamp back on the top of the cat. Once I finally got it seated, I bought a longer bolt to start clamping it down. Once it was snug, put the factory bolt in and torqued it down. Almost gave up and took it to a shop.

[@therrandy2506]

Good Job.

[@NickAnkosko]

@InlineSixAuto Can you provide an update on how this CTS downpipe is holding up for you almost 3 years later? I am between CTS and VRSF, I like that CTS maintains mounting points like the OEM DP. Have you had any issues since installing?

[@Cranklotus]

I just got a cts catless for my xdrive 435i, same priccess id assume?

[@scarllotyshipingana6448]

Trying to order CTS Turbo but the is an issue, '' no shipping options available'' when checking out, emailed them no response

[@brianshallenberger7784]

Getting that top clamp on was a pain in the arse. I had to use the old gasket, because o tore up the new one trying to get it on.

[@dontriskett8098]

I’m having serious trouble getting that top clamp on- how did you end up getting it on?

[@droppinBOMBS310]

a 90 degree tool would help for the top clamp

[@Streamlined955]

Hey, on an unrelated note. How did you handle the tire pressure sensors when you bought your 437m set? Did you swap your old sensors to the new wheels or buy a new set?

[@InlineSixAuto]

Since they’re OEM off an F80 M3, they came with sensors. All I had to do was just reset them and pair them with the car’s TPMS.

[@steevehenrius1682]

What’s the tread on those bold

[@Lt-oi3lc]

Question I have a 2014 bmw 640i f06 n55.is this part compatible with my bmw. 640i?.minds also has an electronic waste gate

[@InlineSixAuto]

I dont think so. Not sure though. You should check out CTSTurbo.com and see if they have one designed for your specific year model.

[@hqn12]

Is a tune required?

[@skerdev29]

Hey bro nice video. Mind if I ask if there's a difference between xdrive and rear wheel when ordering a downpipe as I can't find any solid answer ? I got a f30 335xi. Cheers !

[@InlineSixAuto]

Yes there is a difference. CTS Turbo has a different downpipe for xDrive N55 I believe.

[@grandsuhn]

The only difference is if you have a pneumatic wastegate or electronic wastegate

[@chrisginoc]

I have a Supra (B58) and have been debating between this CTS catted downpipe or a more commonly used Active Autowerks downpipe, but the 2nd option is expensive. No regets with the CTS?

[@InlineSixAuto]

zero. worked just fine after 1.5 years. I ended up trying the catless dp from cts just to see the difference.

[@chrisginoc]

​@@InlineSixAutoCTS Catted wasn't anywhere near as loud as the catless version correct?

[@InlineSixAuto]

@@chrisginoc They were actually pretty similar in loudness. The catless made it somewhat louder but overall there wasn't a huge difference in loudness

[@saraorozco2596]

I have a 2013 n20 f30, which pneumatic wastegate would you recommend?

[@theodorecendejas1343]

Leave it stock

[@salvadorgutierrez4854]

Did you get a check engine light after the install and I wonder if it will pass smog inspection because I live in Southern California

[@InlineSixAuto]

yes a check engine light appeared the next day. But once I tuned it with bootmod3, it went away. and no it wont pass inspection unless you know a smog tech personally or pay someone extra to pass you. Or you can put your stock cat back on when it comes time for smog check

[@biggieswags6790]

@@InlineSixAuto the catted one won’t pass?

[@InlineSixAuto]

@@biggieswags6790 No it will still be flagged in their devices they use.

[@NickAnkosko]

How is this CTS DP holding up for you almost 3 years later? I am between CTS and VRSF and leaning CTS due to having mounting brackets like OEM. Have you had any issues with it? Thanks

[@InlineSixAuto]

I had it on for about 1.5 years before I ended up getting a catless downpipe also from CTS turbo. I had that one on for almost a year until I ended up selling this car. But I never had any issues with either, they both worked perfectly for the time I had them. Definitely recommend 100%

[@NickAnkosko]

@@InlineSixAuto Thanks man! Really appreciate your fast reply.

[@sylin2977]

Need help, I have catless and I won’t pass smog what should I do?

[@InlineSixAuto]

put the stock cat back in when its time to smog or pay someone extra to pass you

[@hiezertaryn691]

Hey man you know the bracket that holds the down pipe to the car? Do you know the type of nut and bolts they are? And what kind? Im planning on putting my cats back on but i lost all the nuts and bolts lol.

[@InlineSixAuto]

Do you mean the clamps that are holding the top of cat to the back of the turbo and on the bottom that connects to the rest of the exhaust?

[@hiezertaryn691]

@@InlineSixAuto the ones you were taking off at 14:21

[@InlineSixAuto]

@@hiezertaryn691 Oh okay. Im not exactly sure what size or what kind. You could try looking on FCP Euro that's usually the first place I check. If not you could always try the BMW Dealership.

[@methodsofbeyond]

E torx

[@grandsuhn]

Hey bro sorry for late response but I am currently doing this to my F30 335 and the bolts that are used on the clamp that holds the Cat to car, these are 13mm

[@hasbar1980]

Is the inner cylinder suppose to be 4 inches on EWG?

[@InlineSixAuto]

yess

[@alfrede.neuman8611]

Did you end up getting a check engine light at any point? I'm considering going with a high flow catted downpipe on my B58 powered F36, but I'm afraid of getting the CEL. My car has the 355hp MPPSK package on it already, so I don't want to spend another $500 on a tune, just to clear a CEL and only gain a few more horsepower in the process.

[@InlineSixAuto]

Yes it ended up popping up the next day. Yeah you’ll probably still get a light even with the high flow Downpipe. But I thought the B58 gets a pretty significant power increase with just a Downpipe and tune? Way more than what my N55 would get.

[@InlineSixAuto]

Also it did clear once I flashed it with the tune.

[@alfrede.neuman8611]

@@InlineSixAuto I'm sure it does. With the MPPSK (Power and Sound upgrade), the power goes from 320hp/330tq to 355hp/369tq...which obviously isn't as much as a lot of the aftermarket tunes, but still decent enough that I can't really justify spending another $500+ on an additional tune. Especially considering how smooth the car still is with the BMW tune. I was really just hoping I could add the catted downpipe to the mix to compliment the MPSSK for an added "boost" in power and sound, without giving the ECU a fit. I've heard that running a spacer behind the oxygen sensor can prevent the code....but I've heard mixed results?

[@geeniusatwrok]

@@InlineSixAuto I've read that the CTS catted pipe will often throw a CEL; they make no claim that it won't which is why it's so much cheaper than others, but where I live there's an annual emissions test and if there's a CEL, it'll fail. Which tune did you use? I've got a 2014 N55 as well, mostly unmolested. Mostly. I was planning to do Bootmod3 and do the FMIC, CP and catted DP ( I hate the stink from catless and those are highly-illegal in most parts) at some point. Also: you do you but I find that soundtrack to be SUPER annoying. It's completely unnecessary. Yeah I'm an old white guy yelling at clouds...

[@InlineSixAuto]

@@alfrede.neuman8611 ahh I see. That would sound better. Yeah from what I've seen no matter which downpipe, you'll most likely get a code. Maybe you could do some research on the Wagner Tuning high flow catted downpipe, there's is double the price for the one I put on mine in the video but maybe theirs actually doesn't show any sort of code.

[@eddieluna5372]

Would this work for my 2015 BMW 335i Xdrive N55 F30?

[@InlineSixAuto]

Its a bit different for xDrive. CTS Turbo offers a different downpipe for xDrive F30 N55 models. And I believe the install is slightly different.

[@macho1657]

Do you have to tune the car after the install?

[@InlineSixAuto]

Not right after but within the next few days youre going to want to tune it. Because the car will start to not run efficiently since its not tuned for that much exhaust flow through the cat.

[@Joemond]

Do you remember what size was the v band clamps

[@InlineSixAuto]

This is the top clamp I used www.fcpeuro.com/products/bmw-exhaust-clamp-18307606136 This was the bottom clamp www.fcpeuro.com/products/bmw-exhaust-clamp-335i-activehybrid-3-18307620349

[@Joemond]

Thank you

[@kay__519]

I can barely fit under my car on car ramps its not even lowered. 😩

[@InlineSixAuto]

Going to need a jack with some jack stands lol

[@cameronballard7610]

bruh how were your bolts so loose in literally about to snap mine bc there rusted to shit i’m so annoyed

[@InlineSixAuto]

I would think it would depend on if the car was in a climate that has a lot of rain/snow. I'm in cali so there's not a lot of that here.

[@InlineSixAuto]

maybe some bolt lubricant would help?

[@Christian-cg8bl]

did it make it louder

[@InlineSixAuto]

oh yess

[@alroza1]

Did get a CEL??

[@InlineSixAuto]

Yes it came up the next day. But it went away once I flashed the tune from BM3

[@kinggrimlock35]

Good job, but I sounds like a vacuum cleaner no offense yeah definitely you need aftermarket exhaust

[@InlineSixAuto]

It doesn’t sound like that anymore. Now that I have it with a tune.

[@Manuelo1234]

I warn you guys for ever buying from CTS turbo. My downpipe did not seal properly against the turbo since the flange was warped during manufacturing. This is hard to detect and will cause o2 reading issues. Also one of the nuts was welded shut and did not fit. The downpipe flange itself is also much thinner than stock, which will cause less clamping force against the turbo. After I contacted CTS it turns out they are real scammers with no support. They don’t give a shit and don’t answere phone calls. I wish I would have read the reviews before buy. It seems a lot of people has issues with them, ended up costing me a lot of money and work. Never again….

[@InlineSixAuto]

Sounds like you just got one that wasn’t made properly. That’s what happens sometimes when you mass produce. I’ve Had literally zero issues with mine and it’s still fine after a year. And haven’t seen anyone else besides you now have any issues with theirs. Not saying they handled that well though if they didn’t even offer a refund or something

[@Manuelo1234]

@@InlineSixAuto are you sponsored by them or something? Check the reviews, people have litterly returned parts without getting any refunds. No answeres on phone calls and when you email them they just refer to their policy at the website which force you to pay the return shipment (huge amount if you ship over seas) despite i sent them clear photos and movie of the issue. Your pipe is most likely leaking as well. The problem is the thin design of the flange and the way they are welding. The flange is really warped near the ”bulge outtake) and makes a big gap on the final assembly against the turbo. This is really hard to see when it is assembled.

[@InlineSixAuto]

@@Manuelo1234 No I am not sponsored by them. but Every single performance part I have is from them (FMIC, Chargepipe, intake, Downpipe) and I don't have a single issue with any of them. And no it is not leaking. My car is running just fine pushing 400whp with their high flow downpipe with zero O2 sensor issues. I did a pretty good amount of research on people's reviews on their products and I hardly saw anything bad about the products themselves. If I did I wouldn't have went with their products. Though that was over a year ago so maybe they lowered their product quality after my purchases from them? Now their customer service is another thing, I haven't had to contact them because I haven't had any issues with their products. So I don't have any say on their customer service quality. But their products are just fine, at least the ones I got. Just because you had a bad experience with them doesn't mean everyone does.

[@Manuelo1234]

If you compare the thickness of this flange with a stock flange you will see the difference in thickness and understand why there is a big risk buying this pipe. This issue ended up costing me 340$ + 100$ in import taxes and additional costs in time and labor. I reccomend everyone to buy from a serious company with good support. If I knew this from the beginning I would never gambled with that money.

[@toomuchsauce4442]

Sounds like stock

[@InlineSixAuto]

Not at all.