[BimBimM2]

Originally Posted by Foriegnmonkey1

Haha, well some forums say if you flash back to stock for MHD they don't notice it. It also really depends if my service advisor is an ass

What these forums are definitely failing to mention is this: in the case you have to call BMW for an engine/transmission related warranty issue, BMW will dig into the DME history and will see a history of flashing back and forth, and immediately send you packing with no warranty support. So, sure you can flash back each time visiting your service advisor but that is a useless exercise. All it does is prevent your car from being flagged. However what's the point of preventing the flag when, come crisis time, you will be found out that you had been flashing back and forth and will be left with no warranty?

Anyway if you are on MHD Stage 1, you are now committed to the dark side. Go to Akrapovic and get that DP! Run Stage 2! Pull sub 3.5 second 0-60 times! And don't stop there! Next you are getting Pure 800 turbos

[Foriegnmonkey1]

Originally Posted by BimBimM2

What these forums are definitely failing to mention is this: in the case you have to call BMW for an engine/transmission related warranty issue, BMW will dig into the DME history and will see a history of flashing back and forth, and immediately send you packing with no warranty support. So, sure you can flash back each time visiting your service advisor but that is a useless exercise. All it does is prevent your car from being flagged. However what's the point of preventing the flag when, come crisis time, you will be found out that you had been flashing back and forth and will be left with no warranty?

Anyway if you are on MHD Stage 1, you are now committed to the dark side. Go to Akrapovic and get that DP! Run Stage 2! Pull sub 3.5 second 0-60 times!

Hahaha, well F it. Will do, just gotta maintain the car my self then.

[BimBimM2]

Originally Posted by Foriegnmonkey1

Hahaha, well F it. Will do, just gotta maintain the car my self then.

You can say "fuck it" but really, fuck it. We don't buy BMWs to drive like grandmas haha

Good luck!

[SystemOfUrdaW]

Originally Posted by alohasurftoad

CG Precision DS-1 is arguably as good the Fabspeed for less money, however if you've decided on the AFE twisted steel, that's good because i don't recall reading any one having it here, so you can review it and give us your thoughts afterwards. 400cpsi is same density as stock catalyst so we'll how AFE is getting their gains.

AFE catted is a 300 cpsi
https://www.tdotperformance.ca/afe-4...down-pipe.html
Canadian website i ordered my intake
That AFE is close to be twice the price of the CTS, i hope it is worth it.
CTS is Canadian but i can't find gain numbers anywhere.

on AFE website it is 400 cpsi
but not on that canadian website???
AFE info must be the correct numbers cause it is their product

[SystemOfUrdaW]

Originally Posted by Canadared

I would have gone with the CTS one, I ran their catted DP on my Audi A4 and it got the job done with my IE stg 2 tune. They have a huge following in the VW/Audi crowd and they make quality products. They're based outta BC and they have free shipping anywhere in North America, good sale going on right now too.

That is one of my 2 choices since the beginning of my search.
AFE 400 cpsi vs CTS 200 cpsi.
I thought that less cell means more gains but my knowledge on that is really poor.
I asked for a submission in a shop and they included the CTS DP.
I like that it is a Canadian brand based here in BC Canada.
The fact that i can't find any gain numbers is slowing me down from buying it.
CTS give only the weight of the product 20lb i can't find the website that have the info for AFE weight, i think it's 12 lb

[Foriegnmonkey1]

Originally Posted by alohasurftoad

What kind of warranty do you have? Do you have coverage with aftermarket modifications? If it does, thats a great warranty.

With most warranties, any aftermarket modification has the potential to void a portion of the warranty if its determined that the modification is the cause for the problem or failure. it's usually much more difficult for you to prove that it didnt cause the problem than for the warranter to prove it did.

Your stage 1 flash has already potentially voided many things if it's the kind of warranty I'm aware of.

FBO stage 2 would void much more if I was the warranter.

I mod my car knowing there's a risk, if something fails it may not be covered because of my modification

My warranty is BMW direct CPO warranty.
Covers bumper to bumper.

[SystemOfUrdaW]

Originally Posted by Green33

I’ve got an ER catted DP for my N26 and have been happy with it. Installed perfectly with no smell on my 4-cyl. They do have one for your b58 according to their website. CEL comes on the odd time but since tuning Bm3 st 2 the CEL is permanently disabled anyways so I don’t get it anymore.

WRT performance I’ve read not all catted DP cell ratings are the same. Allegedly some with higher cell density perform better than some lower density and maybe more expensive are better but haven’t seen comparisons on the same car switching downpipes and putting on a dyno. Lots of people swear by lots of things but no hard evidence to support any preferences except that it did what they believed it should or not and installed well or not.

I’m in Canada as well and used N54Tuning.com. They are based out of Mississauga Ontario and ship anywhere in Canada. Before buying send mike from there an email via the website and see what discount code you can use from being on the forum.

Don’t over think it just buy from one of the reputable manufacturers and have some fun. These mods will transform your ride.

After way way way too much thinking, i finally follow your advice and ordered that Evolution Racewerks from n54tuning.
Only good reviews by people here and elsewhere.
waiting for all my deliveries to arrive

[SystemOfUrdaW]

Thanks so much for everyone who gave me advices

[JuniorBimmer]

Any suggestions on what highflow catted downpipe would work on 2015 335xi N55 GT (F34)?

[thejeremyman9]

Originally Posted by JuniorBimmer

Any suggestions on what highflow catted downpipe would work on 2015 335xi N55 GT (F34)?

Your best bet is to do research online and/or contact vendors to confirm availability and fitment for your vehicle, then come back to the forums if you want "reviews" or feedback from people who may be running those DPs.

[JuniorBimmer]

Originally Posted by thejeremyman9

Your best bet is to do research online and/or contact vendors to confirm availability and fitment for your vehicle, then come back to the forums if you want "reviews" or feedback from people who may be running those DPs.

Good idea! i had just emailed 2 of the ones im looking at