Downpipes and stock exhaust

WVUDrJay · 01-27-2015, 09:15 PM

Anyone can comment on the sound of stock exhaust with catless Downpipes? Is it closer to stock or closer to a add on exhaust. If it sounds much better than stock and gets 15-20 hp at less cost it seems like a win.

JustinCredibleM · 01-27-2015, 09:57 PM

Its closer to the stock exhaust, but a little louder with more bass. I have the ER downpipes and they sound pretty good at WOT and tolerable with no drone at highway speeds.

WVUDrJay · 01-27-2015, 09:58 PM

Quote:

Originally Posted by JustinCredibleM

Its closer to the stock exhaust, but a little louder with more bass. I have the ER downpipes and they sound pretty good at WOT and tolerable with no drone at highway speeds.

That's with stock exhaust?

///M ARMY · 01-27-2015, 10:24 PM

Quote:

Originally Posted by JustinCredibleM

Its closer to the stock exhaust, but a little louder with more bass. I have the ER downpipes and they sound pretty good at WOT and tolerable with no drone at highway speeds.

I agree. Sounds really good with stock exhaust.

AyM4 · 01-27-2015, 10:40 PM

Any noticeable drone in any conditions?

dapple · 01-28-2015, 05:04 AM

No drone, just a bit more volume and a more natural exhaust note. more crackles and pops. Sounds perfect IMO.

GOLFFRR · 01-28-2015, 06:45 AM

Do it! maybe get some sort of valve control incase its a touch to loud for you all the time. Thats the best way to go about it with DPs IMO. I would love to hear a video of one of your rides, talking about those of you who posted above that have the DPs with stock exhaust.

Gstone · 01-28-2015, 07:04 AM

And can someone tell me of any downside of down pipes?
Emissions issues, warranty issues, .....

Tiago@VRSF · 01-28-2015, 07:10 AM

Quote:

Originally Posted by JustinCredibleM

Its closer to the stock exhaust, but a little louder with more bass. I have the ER downpipes and they sound pretty good at WOT and tolerable with no drone at highway speeds.

I agree. Just a little louder, no additional drone.

bdoooh · 01-28-2015, 07:54 AM

Ugh you guys are making me want DPs when VRSF releases theirs when I really don't want to mod that bad haha.

WVUDrJay · 01-28-2015, 07:54 AM

Quote:

Originally Posted by Gstone

And can someone tell me of any downside of down pipes?
Emissions issues, warranty issues, .....

+1
I understand they are not "legal" in all states but is there any concern for the car or warranty. I'm not a global warming kind of guy.

NorCal f80 · 01-28-2015, 09:50 AM

I've been meaning to ask the people worried about emissions. Do you guys have to do some check every year? I thought here [CALI] was the worst for emissions but we only have to do smog checks every 5 years which means don't worry about simple non emission mods for 5 years.

Mike@N54Tuning.com · 01-28-2015, 09:57 AM

I usually recommend for a daily driver downpipes with stock exhaust. You get a nice deeper sound which is not much louder, and more importantly not drone that can occur from exhaust change outs.

Also, downpipes provide more gains then exhaust swaps and are considerably cheaper then a full exhaust. So more gains and much less $$ = win

Mike

WVUDrJay · 01-28-2015, 09:58 AM

Quote:

Originally Posted by Mike@N54Tuning.com

I usually recommend for a daily driver downpipes with stock exhaust. You get a nice deeper sound which is not much louder, and more importantly not drone that can occur from exhaust change outs.

Also, downpipes provide more gains then exhaust swaps and are considerably cheaper then a full exhaust. So more gains and much less $$ = win

Mike

Thanks. Very helpful.

VCP · 01-28-2015, 10:10 AM

Quote:

Originally Posted by Mike@N54Tuning.com

I usually recommend for a daily driver downpipes with stock exhaust. You get a nice deeper sound which is not much louder, and more importantly not drone that can occur from exhaust change outs.

Also, downpipes provide more gains then exhaust swaps and are considerably cheaper then a full exhaust. So more gains and much less $$ = win

Mike

Spot on. I have Zima DP's and my exhaust valves unplugged with valves wide open. Perfect.

Schullz51 · 01-28-2015, 12:14 PM

Quote:

Originally Posted by 0-100 real quick

I've been meaning to ask the people worried about emissions. Do you guys have to do some check every year? I thought here [CALI] was the worst for emissions but we only have to do smog checks every 5 years which means don't worry about simple non emission mods for 5 years.

Yes. In PA at least we get emissions and inspection every year. The only way around it is if your car is so old it doesn't have to do emissions or if you drive it less than 5,000 miles a year it is emissions exempt

AutoTalent · 01-28-2015, 01:37 PM

I will be installing downpipes on my otherwise oem exhaust setup next week. I can take in depth videos and dyno charts for you guys.

WVUDrJay · 01-28-2015, 01:38 PM

Quote:

Originally Posted by AutoTalent

I will be installing downpipes on my otherwise oem exhaust setup next week. I can take in depth videos and dyno charts for you guys.

Thanks. Looking forward to it.

GOLFFRR · 01-28-2015, 01:54 PM

Quote:

Originally Posted by AutoTalent

I will be installing downpipes on my otherwise oem exhaust setup next week. I can take in depth videos and dyno charts for you guys.

+1 that would be fantastic!

RocketBoots · 01-29-2015, 04:30 PM

Quote:

Originally Posted by 0-100 real quick

I've been meaning to ask the people worried about emissions. Do you guys have to do some check every year? I thought here [CALI] was the worst for emissions but we only have to do smog checks every 5 years which means don't worry about simple non emission mods for 5 years.

Cali is the worst. Technically illegal, but no way for anybody to know before the 5 yrs unless they check for some reason.

Another negative might be the stink. And you will have to deal with Check Engine Light.

Seems like a really good solution tho. Would also love to hear some more feedback.

FSHNGRY · 02-01-2015, 08:29 PM

Quote:

Originally Posted by AutoTalent

I will be installing downpipes on my otherwise oem exhaust setup next week. I can take in depth videos and dyno charts for you guys.

+1 please do!

teamwerx · 02-02-2015, 04:25 AM

Quote:

Originally Posted by BROCHOP

Quote:

Originally Posted by AutoTalent

I will be installing downpipes on my otherwise oem exhaust setup next week. I can take in depth videos and dyno charts for you guys.

+1 please do!

Plus two

01-27-2015, 09:15 PM	#1
WVUDrJay Captain 262 Rep 658 Posts Drives: 2015 M4 Join Date: Jul 2014 Location: West Virginia iTrader: (0)	Downpipes and stock exhaust Anyone can comment on the sound of stock exhaust with catless Downpipes? Is it closer to stock or closer to a add on exhaust. If it sounds much better than stock and gets 15-20 hp at less cost it seems like a win. __________________ 2015 Alpine white M4\black leather, carbon fiber trim,manual,exec package, 19 inch black rims, M suspension, HK stereo, LED lighting
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01-27-2015, 09:57 PM	#2
JustinCredibleM Second Lieutenant 47 Rep 287 Posts Drives: '15 GT-R, '02 996TT Join Date: Mar 2014 Location: Las Vegas, NV \| San Diego, CA iTrader: (0)	Its closer to the stock exhaust, but a little louder with more bass. I have the ER downpipes and they sound pretty good at WOT and tolerable with no drone at highway speeds.
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01-27-2015, 10:40 PM	#5
AyM4 Enlisted Member 5 Rep 44 Posts Drives: M4 Join Date: Nov 2014 Location: SE Michigan iTrader: (0) Garage List 1983 Mini Turbo [0.00] 2015 BMW M4 [0.00]	Any noticeable drone in any conditions?
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01-28-2015, 05:04 AM	#6
dapple Banned 35 Rep 122 Posts Drives: F10 M5 and F80 M3 Join Date: Jul 2013 Location: uk iTrader: (0)	No drone, just a bit more volume and a more natural exhaust note. more crackles and pops. Sounds perfect IMO.
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01-28-2015, 06:45 AM	#7
GOLFFRR 10817 Rep 27,600 Posts Drives: GOLFFRR cart Join Date: Mar 2009 Location: we sell BMWs to "ALL" US states iTrader: (4)	Do it! maybe get some sort of valve control incase its a touch to loud for you all the time. Thats the best way to go about it with DPs IMO. I would love to hear a video of one of your rides, talking about those of you who posted above that have the DPs with stock exhaust. __________________ BEFORE YOU BUY YOUR NEXT BMW, EMAIL OUR GUY KOTE FIRST! Kote M Sales:Kotem@bmwofcamarillo.com Cell:805-368-9101 vipfinance@bmwofcamarillo.com for warranties!
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01-28-2015, 07:04 AM	#8
Gstone Lieutenant 142 Rep 555 Posts Drives: '18 GT350, '15 M4 sold Join Date: Sep 2014 Location: NY Burbs iTrader: (0)	And can someone tell me of any downside of down pipes? Emissions issues, warranty issues, .....
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01-28-2015, 07:54 AM	#10
bdoooh Captain 112 Rep 969 Posts Drives: 2014 SSII M5 CP Join Date: Feb 2011 Location: Ohio iTrader: (2)	Ugh you guys are making me want DPs when VRSF releases theirs when I really don't want to mod that bad haha.
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01-28-2015, 09:50 AM	#12
NorCal f80 Lieutenant Colonel 346 Rep 1,656 Posts Drives: M3 Join Date: Apr 2014 Location: Nor Cal iTrader: (0)	I've been meaning to ask the people worried about emissions. Do you guys have to do some check every year? I thought here [CALI] was the worst for emissions but we only have to do smog checks every 5 years which means don't worry about simple non emission mods for 5 years.
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01-28-2015, 09:57 AM	#13
Mike@N54Tuning.com Joint Chiefs of Staff 4918 Rep 115,980 Posts Drives: 2007 335i, 2015 M3 Join Date: Dec 2008 Location: N54tuning.com iTrader: (89)	I usually recommend for a daily driver downpipes with stock exhaust. You get a nice deeper sound which is not much louder, and more importantly not drone that can occur from exhaust change outs. Also, downpipes provide more gains then exhaust swaps and are considerably cheaper then a full exhaust. So more gains and much less $$ = win Mike
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01-28-2015, 01:37 PM	#17
AutoTalent Lieutenant General 2311 Rep 12,654 Posts Drives: e92 M3 6mt \| e60 M5 6mt Join Date: Jul 2007 Location: Los Angeles iTrader: (11)	I will be installing downpipes on my otherwise oem exhaust setup next week. I can take in depth videos and dyno charts for you guys.
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