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      08-19-2015, 06:10 PM   #1
Mr_M5Guy
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Which Downpipes To Purchase?!?!

So I now have 8k miles on my competition package M5 and would like to do some additional mods. My car is stock other MSR intake and cosmetic changes. My next mode is downpipes.

There are so many choices: RPI, Undercover, ER, Evolve, etc. What are the differences between the manufacturers, are they the same size, build quality?

Any assistance would be greatly appreciated!
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      08-19-2015, 08:03 PM   #2
apsuard
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I'm in the same boat. After doing a lot of research I think a lot of it is just preference. If you go with any of the top tier that you mention above they should all be high quality. I'm leaning towards ER or AMS. Reason for AMS is because I love working with iND and they sell them.
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      08-21-2015, 10:44 AM   #3
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Undercover / Fabworks Custom Fabrication for my Beast and A few members here also
@middlyman 6spdterror @1eighty IGor and a few more members I know that are not in this forum.

I have Full 3" dp to exhaust. although if you choose this route you will Grind out where the DP come out underneath as the hole is only 2.75" in diameter.
so if you are just upgrading to just dp for now and not full exhaust, i would suggest stick with a 3"-2.75 bend so that it will fit onto your stock exhaust.
RPI,AMS,AKRA, Meisterschaft and Fabworks are some brands that carry the regular size DP.

imo, if you just shopping for dp, Any brand would work as they to me are all the same.
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      08-21-2015, 12:12 PM   #4
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We run AMS and Undercover Performance downpipes on our 2 S63tu shop cars
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      08-21-2015, 12:29 PM   #5
joe@trinityautosport
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I ran RPi downpipes and was happy. If you need pricing PM me
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      08-21-2015, 01:09 PM   #6
RPiM5
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Quote:
Originally Posted by joe@trinityautosport View Post
I ran RPi downpipes and was happy. If you need pricing PM me
+1 for Joe@Trinity. You really can't find better service than Trinity Autosport. IND is good too, but I prefer Trinity myself.
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      08-21-2015, 03:27 PM   #7
SCM513
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I see alot of people.mostly with the Ams dps but has anyone tried the ESS dps??? Considering of throwing them on to couple it with an ESS t-700 tune
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      08-21-2015, 09:41 PM   #8
VR000M5
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anyone try the supersprint downpipes yet?
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      08-22-2015, 12:41 PM   #9
mstmng
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Quote:
Originally Posted by VR000M5 View Post
anyone try the supersprint downpipes yet?
i hv been running them for 30k+ miles

no matter what catless dp's u go they are all catless

nothing wrong with SS
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      08-22-2015, 06:40 PM   #10
VR000M5
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Quote:
Originally Posted by mstmng View Post
i hv been running them for 30k+ miles

no matter what catless dp's u go they are all catless

nothing wrong with SS
sweet. any issues? errors? codes given off?

what exhaust are you running with the downpipes?

i had a discussion with someone before about the SS downpipes, the guy was saying there was mini cats in there?
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      08-22-2015, 06:56 PM   #11
mstmng
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Quote:
Originally Posted by VR000M5
Quote:
Originally Posted by mstmng View Post
i hv been running them for 30k+ miles

no matter what catless dp's u go they are all catless

nothing wrong with SS
sweet. any issues? errors? codes given off?

what exhaust are you running with the downpipes?

i had a discussion with someone before about the SS downpipes, the guy was saying there was mini cats in there?
I have rpi gtm as it states in signature
No mini cats
CEL will pop up after 5-10 miles
But i had driven with black tape on top of it for over 20k miles with no issues + BMS piggy and then i got tune done and got rid of CEL
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      08-22-2015, 10:56 PM   #12
Bushido Brown
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Quote:
Originally Posted by SCM513 View Post
I see alot of people.mostly with the Ams dps but has anyone tried the ESS dps??? Considering of throwing them on to couple it with an ESS t-700 tune
Good question. Does anyone know if their catted dp's will throw a cel? Theirs are 200 cell.
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      08-23-2015, 11:03 AM   #13
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So you say you run out of space for inch DP, so what is the solution?
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      08-23-2015, 03:46 PM   #14
lfelunden
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Depends on how much you want to spend, if you go full exhaust + dp + tune (nice) then go for topbrands like Supersprint, ER or AMS.
Now we got some new exhausts in our collection, go look for Friedrich Motorsport - much cheaper, at least for those in Europe!
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      08-23-2015, 07:43 PM   #15
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Quote:
Originally Posted by PDOT View Post
So you say you run out of space for inch DP, so what is the solution?
Not that I ran out of space, the Factory slot where downpipes go through are only 2.75" exact, Solution was just to grind it out and make it wider.

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      08-24-2015, 09:44 AM   #16
iamvietness
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additional question on top....what are the from catted DP compared to stock? I know most go for catless just a curiosity question.

Quote:
Originally Posted by Bushido Brown View Post
Good question. Does anyone know if their catted dp's will throw a cel? Theirs are 200 cell.
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      08-24-2015, 10:06 AM   #17
Mr_M5Guy
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I'm getting quoted 5-8 hours for install.... That seems high, I thought it was around 3-4 hours
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      08-24-2015, 02:13 PM   #18
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Quote:
Originally Posted by Mr_M5Guy View Post
I'm getting quoted 5-8 hours for install.... That seems high, I thought it was around 3-4 hours
For Downpipes it should be 3-4hrs. or less,
mine took around 3hrs
2hrs to take off stock dp and put new dp on,with exhaust
1hr to grind the hole
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      08-30-2015, 10:21 AM   #19
Boostedm514
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Best design proven is undercover performance/fabworx brand downpipes nicer then ams design wise ! And better priced also
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      08-30-2015, 01:16 PM   #20
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2014 BMW F10 M5  [10.00]
Depends whether you gonna run your stock CP exhaust. For me.. I love RPi products so I would probably go RPi route with Joe at Trinity..but as pointed out there are all pretty much the same..
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2014 BMW F10 M5 ZCP | SSII / Black | MSR Stage III | MSR Intakes | RPi GTM Exhaust | RPi Catless Downpipes |RW Carbon Front Lip | RW Carbon Diffuser | RW Carbon Trunk Spoiler |
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      08-30-2015, 01:56 PM   #21
AhmadHasib
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Quote:
Originally Posted by joe@trinityautosport View Post
I ran RPi downpipes and was happy. If you need pricing PM me
I just ordered RPi GTM exhaust and downpipes from Joe. I've called him 3+ times after placing the order asking for advice on other exhausts. He's even answered my call when he was off work with the kids. Great customer service! Will be buying the rest of my parts from Joe.

Great thing about GTM downpipes is that it's a straight bolt on that doesn't require any grinding of the firewall for fitment.

Last edited by AhmadHasib; 08-30-2015 at 02:02 PM..
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      09-01-2015, 03:01 AM   #22
boots
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^^^this and they perform^^^
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