[parabmw]

im on the fence about dps. ive read that they increase the wg rattle noise.

am i correct that power gains are a result of running more boost. so pushing the life of the turbos?

at least FMIC increase power by cooling IATs at same boost level and reducing pressure drop.

is the only other benefit of dps quicker spool?
any feedback would be appreciated.

[eric@helix]

There's a lot on here about DPs. They do accetuate WG rattle noise, and if you're talking about catless, and you don't have the unmetered cat in the rear section of your exhaust (if you have aftermarket exhaust), your fumes will stink to high hell. That having been said, if you want the performance of full bolt-on, you gotta do it. A good intercooler doesn't have the downsides of DPs.

[Tiago@VRSF]

Replacing the OEM downpipes with a catless set decreases back pressure which lengthens the life of your turbos & engine, it doesn't put additional wear on them.

A tune will increase the boost levels which will put a bit of pre-mature wear on your turbos. This is the compromise we make when modifying cars. Upgraded downpipes are hands down on of the most popular mods on this platform for a reason

[BAL278]

Originally Posted by Tiago@VRSF

Replacing the OEM downpipes with a catless set decreases back pressure which lengthens the life of your turbos & engine, it doesn't put additional wear on them.

A tune will increase the boost levels which will put a bit of pre-mature wear on your turbos. This is the compromise we make when modifying cars. Upgraded downpipes are hands down on of the most popular mods on this platform for a reason

and if you do decide to get DP's... VRSF are the best bang for the buck

[JAL0988]

Being FBO, DP's were and still are my favorite mod. More sound without being too much and more power. Hands down the best.

[Mike@N54Tuning.com]

Originally Posted by Tiago@VRSF

Replacing the OEM downpipes with a catless set decreases back pressure which lengthens the life of your turbos & engine, it doesn't put additional wear on them.

A tune will increase the boost levels which will put a bit of pre-mature wear on your turbos. This is the compromise we make when modifying cars. Upgraded downpipes are hands down on of the most popular mods on this platform for a reason

Well said..

Mike

[chepy24]

iv been thinking of pulling the trigger as well. i just started to get the annoying siren noise and heard it gets worse with catless dp's is this true?

[crypticc]

What about sport cats? E.g. would that allow running of Cobb stg 2 still and without stinking to high-heaven as tiago@vrsf and Mike said?

[Mike@N54Tuning.com]

Originally Posted by crypticc

What about sport cats? E.g. would that allow running of Cobb stg 2 still and without stinking to high-heaven as tiago@vrsf and Mike said?

ar design makes one of the best high flow catted pipes on the market, so those would be the ones I would be focusing your research on.

Mike

[Mike@N54Tuning.com]

Originally Posted by chepy24

iv been thinking of pulling the trigger as well. i just started to get the annoying siren noise and heard it gets worse with catless dp's is this true?

Downpipes can heighten waste gate rattle so any noise from the turbos will be louder as the stock cats muffle a lot of that sound.

If your turbos are wailing like sirens I would get those replaced before modding any further.

Mike

What about going with catless downpipes then adding a couple of these after the downpipes themselves? Would that work?
http://www.mandrelbendingsolutions.c...CPSI%29/Detail

[parabmw]

why are ar design over 2x the price of vrsf? is there something so special or different?

[cvc 22349a]

Originally Posted by Mike@N54Tuning.com

ar design makes one of the best high flow catted pipes on the market, so those would be the ones I would be focusing your research on.

Mike

Mike
Can you confirm whether or not AR catted dp's trigger a cel or any obd2 emissions errors?

[Tiago@VRSF]

Originally Posted by parabmw

why are ar design over 2x the price of vrsf? is there something so special or different?

I can't comment on why the AR DPs cost as much as they do since we have no insight as to how much their costs.

Our DP's are less expensive because we have significantly less overhead than most shops which gives us the ability to sell at lower prices/margins. They're made from 304 grade stainless steel, incorporate a cast bell mouth design (only 3" DP on the market with a cast mouth design) and come with a lifetime warranty.

[Mit_Boost]

FMIC > DPs. You'll get better, much more consistent performance. It also means you won't have any headaches with a BMW Service Dept or Inspection. IF you do have WG Rattle, every N54 BMW is still under the manufacturer 8-year extended warranty so try to have them replaced before you make any modifications to the car.

If you're not worried about dealing with those 2 agencies, then DPs are necessary to maximize the performance potential of the stock turbos, and any turbo upgrades you may consider beyond the stockers.

If you decide to get DPs (or any mod for that matter), just make sure that you have a tune that'll appropriately modifying the OEM tables and allow you to safely maximize your performance.

[Mit_Boost]

Originally Posted by parabmw

why are ar design over 2x the price of vrsf? is there something so special or different?

They're handmade in the USA, I have NEVER heard of fitment issues. There is nothing wrong with any of the mainstream options -- AR, BMS, CPE, VRSF, etc

[chepy24]

Originally Posted by Mike@N54Tuning.com

Downpipes can heighten waste gate rattle so any noise from the turbos will be louder as the stock cats muffle a lot of that sound.

If your turbos are wailing like sirens I would get those replaced before modding any further.

Mike

would this be covered under the 8 yr turbo warranty??

[Allen@MOTIV]

Originally Posted by Tiago@VRSF

Replacing the OEM downpipes with a catless set decreases back pressure which lengthens the life of your turbos & engine, it doesn't put additional wear on them.

A tune will increase the boost levels which will put a bit of pre-mature wear on your turbos. This is the compromise we make when modifying cars. Upgraded downpipes are hands down on of the most popular mods on this platform for a reason

Well said.

Originally Posted by Mit_Boost

They're handmade in the USA, I have NEVER heard of fitment issues. There is nothing wrong with any of the mainstream options -- AR, BMS, CPE, VRSF, etc

+1

[parabmw]

Originally Posted by Mit_Boost

They're handmade in the USA, I have NEVER heard of fitment issues. There is nothing wrong with any of the mainstream options -- AR, BMS, CPE, VRSF, etc

oh, so the price difference is for AR design Dps is mainly because they are USA made?
where are VRSF made?

08 335 with no WG ratte. maybe i should put the Dps on and push my turbos...maybe get new ones on before warranty runs out.
but then again, OEM turbos are pretty cheap nowadays.

[Tiago@VRSF]

Our DP's are made overseas. Labor rates here tend to be pretty high in comparison but there's quite a few brands on this platform that have a BMW tax attached to their prices.

[stanlalee]

Originally Posted by parabmw

oh, so the price difference is for AR design Dps is mainly because they are USA made?
where are VRSF made?

You know where VRSF, BMS, N54Tuning and all the $300-400 DPs come from These kind of questions are mainly the reason why lol. Hard to sell principle to customers when someone else is offering a fully functional version of the same thing for half the price.

[Mit_Boost]

Originally Posted by stanlalee

You know where VRSF, BMS, N54Tuning and all the $300-400 DPs come from These kind of questions are mainly the reason why lol. Hard to sell principle to customers when someone else is offering a fully functional version of the same thing for half the price.

Nothing against VRSF/BMS DPs, but if you've ever seen an AR DP, the welds are incredible and you're really paying for a top of the line product (just like if you bought Akra DPs, they all do the same thing but the product quality is very different).