Russian downpipes for X3M

AlexFL · 09-13-2020, 10:10 PM

These are really interesting downpipes, because you can configure them with the high quality 300 cell GESI cats. Obviously not cheap but well worth the price tag imo (compare with Supersprint GESI downpipes). If you search bimmerpost for “Red Star Exhaust”, you will find that some people have already bought exhaust parts from them.

https://redstarexhaustusa.com/bmw/10...eld-heatshield

4151zero · 09-13-2020, 11:26 PM

nice! whos gonna be first to test both catted versions

pluckydks · 09-13-2020, 11:53 PM

Quote:

Originally Posted by 4151zero

nice! whos gonna be first to test both catted versions

By posting it, I also assumed that AlexFL also already ordered it lol

Sash///M · 09-14-2020, 08:47 AM

Hey guys. I have this in my car. Had them installed and fitted about 6 weeks ago.
Absolutely love them! Really good quality 👌

BrockDM · 09-14-2020, 09:10 AM

Just wanted to throw my 2 cents in and say Red Star makes extremely high quality exhaust pieces. They have been growing rapidly in the Audi scene (my other car is an S4) and everyone loves them. They don't come cheap but just know you are paying for some of the best on the market!

James Cole · 09-15-2020, 07:20 AM

Does it help with the initial lag?

evo-mike · 09-15-2020, 07:45 AM

Quote:

Originally Posted by James Cole

Does it help with the initial lag?

Any exhaust modification that increases exhaust flow should help the turbos spool quicker which means boost at lower rpms. The more exhaust flow that is created the faster they spool. Question is how much is actually created. Really you'd need before/after dyno numbers to compare. It's been debated here that downpipes don't do much. But stock cats are usually pretty restrictive so it'll help at least some.

AlexFL · 09-15-2020, 09:26 AM

Quote:

Originally Posted by evo-mike

Any exhaust modification that increases exhaust flow should help the turbos spool quicker which means boost at lower rpms. The more exhaust flow that is created the faster they spool. Question is how much is actually created. Really you'd need before/after dyno numbers to compare. It's been debated here that downpipes don't do much. But stock cats are usually pretty restrictive so it'll help at least some.

Maybe you will find this old thread interesting. We have yet to see an F97 downpipe salesman presenting plus/minus dyno results and I wonder why

.

https://x3.xbimmers.com/forums/showthread.php?t=1697166

evo-mike · 09-15-2020, 10:15 AM

Quote:

Originally Posted by AlexFL

Quote:

Originally Posted by evo-mike

Any exhaust modification that increases exhaust flow should help the turbos spool quicker which means boost at lower rpms. The more exhaust flow that is created the faster they spool. Question is how much is actually created. Really you'd need before/after dyno numbers to compare. It's been debated here that downpipes don't do much. But stock cats are usually pretty restrictive so it'll help at least some.

Maybe you will find this old thread interesting. We have yet to see an F97 downpipe salesman presenting plus/minus dyno results and I wonder why

.

https://x3.xbimmers.com/forums/showthread.php?t=1697166

There was the one but you didn't like his dyno chart

AlexFL · 09-15-2020, 10:24 AM

Quote:

Originally Posted by evo-mike

There was the one but you didn't like his dyno chart

correct. I can bet with you that if you did that measurements (btw, should be 3 measurements per condition), there would be no statistically significant difference.

evo-mike · 09-15-2020, 10:28 AM

Quote:

Originally Posted by AlexFL

Quote:

Originally Posted by evo-mike

There was the one but you didn't like his dyno chart

correct. I can bet with you that if you did that measurements (btw, should be 3 measurements per condition), there would be no statistically significant difference.

Maybe, downpipes only might freak out ecu too much. I'd like to see stg 1 vs stg 1 with dp then do stg2 or stand-alone (racechip, jb4, etc)vs stand-alone with dp

James Cole · 09-15-2020, 11:57 AM

Guys do we know if our stock primary cats are metal like the F80s or ceramic?

FSociety · 10-03-2020, 08:26 PM

Redstar is a good name!
My friend's sell a lot of their product to Benz customers

r33_RGSport · 10-03-2020, 08:32 PM

Quote:

Originally Posted by evo-mike

Quote:

Originally Posted by AlexFL

Quote:

Originally Posted by evo-mike

There was the one but you didn't like his dyno chart

correct. I can bet with you that if you did that measurements (btw, should be 3 measurements per condition), there would be no statistically significant difference.

Maybe, downpipes only might freak out ecu too much. I'd like to see stg 1 vs stg 1 with dp then do stg2 or stand-alone (racechip, jb4, etc)vs stand-alone with dp

I have my dyno sheet. Fair and square.
But I won't release it since no one is doing fair comparison before and after on the same tune and gas, just downpipe difference.

All the dyno that I've seen are stock with 91, then catless with e30 tune or others.

evo-mike · 10-03-2020, 08:48 PM

Quote:

Originally Posted by r33_RGSport

Quote:

Originally Posted by evo-mike

Quote:

Originally Posted by AlexFL

Quote:

Originally Posted by evo-mike

There was the one but you didn't like his dyno chart

correct. I can bet with you that if you did that measurements (btw, should be 3 measurements per condition), there would be no statistically significant difference.

Maybe, downpipes only might freak out ecu too much. I'd like to see stg 1 vs stg 1 with dp then do stg2 or stand-alone (racechip, jb4, etc)vs stand-alone with dp

I have my dyno sheet. Fair and square.
But I won't release it since no one is doing fair comparison before and after on the same tune and gas, just downpipe difference.

All the dyno that I've seen are stock with 91, then catless with e30 tune or others.

Never knew you were such a tease Ben

r33_RGSport · 10-03-2020, 09:15 PM

Quote:

Originally Posted by evo-mike

Quote:

Originally Posted by r33_RGSport

Quote:

Originally Posted by evo-mike

Quote:

Originally Posted by AlexFL

Quote:

Originally Posted by evo-mike

There was the one but you didn't like his dyno chart

correct. I can bet with you that if you did that measurements (btw, should be 3 measurements per condition), there would be no statistically significant difference.

Maybe, downpipes only might freak out ecu too much. I'd like to see stg 1 vs stg 1 with dp then do stg2 or stand-alone (racechip, jb4, etc)vs stand-alone with dp

I have my dyno sheet. Fair and square.
But I won't release it since no one is doing fair comparison before and after on the same tune and gas, just downpipe difference.

All the dyno that I've seen are stock with 91, then catless with e30 tune or others.

Never knew you were such a tease Ben

Am I? Haha.

m20e3087 · 08-06-2021, 09:35 AM

Reviving the post, those who had installed Redstar, how's is it holding up? I am considering a DP for my G80. It looks like they are well known in the AMG and Audi community not so much in BMW.

TTR · 08-06-2021, 07:57 PM

Want it with 300cells Cat!, i have decat now, but sometimes it's too loud, even u in efficient mode

TTR · 08-06-2021, 07:59 PM

Quote:

Originally Posted by James Cole

Does it help with the initial lag?

Should a lot! I have decat downpipes and have no lag, but with decat it's a little bit loud, i mean when u cruising like 160 km/h - u hear the engine and with long trips it's could be boring, even in efficient mode with closed vales, 300cells cat should be nuts

TTR · 08-06-2021, 08:00 PM

Where i can order they in Europe?

09-13-2020, 10:10 PM	#1
AlexFL Brigadier General 7837 Rep 4,607 Posts Drives: BMW Join Date: Jun 2019 Location: South Florida iTrader: (0)	Russian downpipes for X3M These are really interesting downpipes, because you can configure them with the high quality 300 cell GESI cats. Obviously not cheap but well worth the price tag imo (compare with Supersprint GESI downpipes). If you search bimmerpost for “Red Star Exhaust”, you will find that some people have already bought exhaust parts from them. https://redstarexhaustusa.com/bmw/10...eld-heatshield Attached Images Last edited by AlexFL; 09-13-2020 at 10:46 PM..
	Appreciate 2 pluckydks621.50 FSociety3812.50 Tweet Quote

09-13-2020, 11:26 PM	#2
4151zero HOV clogger 134 Rep 262 Posts Drives: ///M5 and i3 BEV Join Date: Mar 2018 Location: SFO NORCAL iTrader: (4)	nice! whos gonna be first to test both catted versions
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09-14-2020, 08:47 AM	#4
Sash///M Private 57 Rep 66 Posts Drives: Black X4M Competition and Froz Join Date: Feb 2015 Location: Melbourne, Australia iTrader: (0)	Hey guys. I have this in my car. Had them installed and fitted about 6 weeks ago. Absolutely love them! Really good quality 👌 Attached Images
	Appreciate 5 AlexFL7837.00 DucatiT1098S163.50 MarkWithAnM99.00 FSociety3812.50 Max Well4737.50 Quote

09-14-2020, 09:10 AM	#5
BrockDM Captain 2043 Rep 998 Posts Drives: F97 X3MC Join Date: Apr 2014 Location: Chicago, IL iTrader: (0)	Just wanted to throw my 2 cents in and say Red Star makes extremely high quality exhaust pieces. They have been growing rapidly in the Audi scene (my other car is an S4) and everyone loves them. They don't come cheap but just know you are paying for some of the best on the market!
	Appreciate 4 AlexFL7837.00 4151zero133.50 LloydP83.50 FSociety3812.50 Quote

09-15-2020, 07:20 AM	#6
James Cole Private 33 Rep 98 Posts Drives: M3 Join Date: Apr 2020 Location: Texas iTrader: (0)	Does it help with the initial lag?
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09-15-2020, 11:57 AM	#12
James Cole Private 33 Rep 98 Posts Drives: M3 Join Date: Apr 2020 Location: Texas iTrader: (0)	Guys do we know if our stock primary cats are metal like the F80s or ceramic?
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10-03-2020, 08:26 PM	#13
FSociety IG @bmwF9xG80 3813 Rep 7,593 Posts Drives: G80 M3, X4M, G07 X7m50 Join Date: Apr 2012 Location: NYC to NJ to Orlando FL iTrader: (3) Garage List 2023 BMW G80 M3 [0.00] 2020 BMW X4MC [0.00] 16' BMW X4 M40i [10.00] 06 Cadillac STS [0.00]	Redstar is a good name! My friend's sell a lot of their product to Benz customers __________________ 60-130mph 6.5s X4M #HCP 60-130mph 5.0s G80 M3 #OrlandoAutowerks Sauce IG: @bmwF9XG80
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08-06-2021, 09:35 AM	#17
m20e3087 Major 1150 Rep 1,409 Posts Drives: G87 Join Date: Mar 2012 Location: FL iTrader: (0) Garage List 2019 BMW M2C [0.00]	Reviving the post, those who had installed Redstar, how's is it holding up? I am considering a DP for my G80. It looks like they are well known in the AMG and Audi community not so much in BMW.
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08-06-2021, 07:57 PM	#18
TTR Captain 307 Rep 608 Posts Drives: m3 f80, X3M, Huracan perf, 1m Join Date: Jul 2017 Location: Portugal - Lisboa iTrader: (0)	Want it with 300cells Cat!, i have decat now, but sometimes it's too loud, even u in efficient mode
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08-06-2021, 08:00 PM	#20
TTR Captain 307 Rep 608 Posts Drives: m3 f80, X3M, Huracan perf, 1m Join Date: Jul 2017 Location: Portugal - Lisboa iTrader: (0)	Where i can order they in Europe?
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