Keller Race Cats or Vibrant Performance Resonators ...

3sgte · 06-12-2019, 09:56 AM

Hi,

Did anyone try the Keller Race Cats with lower downpipes and an aftermarket exhaust?

I have their full upper and lower downpipes with a full Akrapovic system and it's a bit too loud for my liking. It's popping and banging with the valves closed

Am hoping someone has a similar setup but with the Keller Race Cats so they can give me their opinion.

Another option is to weld in some Vibrant Performance Titanium Resonators into the Akrapovic midpipes!

Any thoughts?

Cheers

jjjjjjjjjjjjj · 06-13-2019, 05:09 AM

Quote:

Originally Posted by 3sgte

Hi,

Did anyone try the Keller Race Cats with lower downpipes and an aftermarket exhaust?

I have their full upper and lower downpipes with a full Akrapovic system and it's a bit too loud for my liking. It's popping and banging with the valves closed

Am hoping someone has a similar setup but with the Keller Race Cats so they can give me their opinion.

Another option is to weld in some Vibrant Performance Titanium Resonators into the Akrapovic midpipes!

Any thoughts?

Cheers

Do you have any videos on how it sounds on vales open/close? Im going to have same setup next week and the possibility it being too loud makes me nervous

TexasSurgeon · 06-13-2019, 11:35 PM

I have Keller midpipes and downpipes on my M5C with the stock comp exahust

It sounds absolutely amazing.. the perfect sound for the M5C IMO. I am not going to do anything further to the exhaust. It is very loud and anything more would just be obnoxious and over the top.

The other thing that these pipes add is the new sound of the turbos.. they have a sublime loud whistle to them now... music to my ears!

I was at the BMW dealership today and Everyone was in awe at the sound!

The Keller pipes fit perfect on the M5Comp.
Highly recommend!

I will post some videos soon

jc16 · 06-16-2019, 10:00 AM

how about just sticking the stock upper downpipes back on? and any of you guys have issues with the CEL with the full downpipes? im am currently waiting for upper and lower ipe downpipes and akra exhaust and you guys are getting me worried about the sound

Catchmeifyoucanf90 · 06-16-2019, 01:20 PM

I have eisenmann race (loudest one) with Keller lower downpipes and m midpipe and I think it's the perfect on loudness. When it's wot, it gets loud and down shifting you get your burbles but as soon as you turn off valves, the ecu takes away the burbles and it's quite again, nothing like stock quiet but you could drive by a cop and he wouldn't even look at you or hear you lol cold start is loud for a while and then it calms down after 10-15 seconds . I'm even thinking about putting on upper Keller's on but too Afraid of it being too loud especially cause i live in California

TexasSurgeon · 06-20-2019, 11:00 PM

Quote:

Originally Posted by jc16

how about just sticking the stock upper downpipes back on? and any of you guys have issues with the CEL with the full downpipes? im am currently waiting for upper and lower ipe downpipes and akra exhaust and you guys are getting me worried about the sound

You will get a CEL if you do the full keller downpipe and keller midpipe setup.

You will also notice a slight exhaust smell.
Its not bad, but it is present and noticeable

mike@x-ph.com · 06-28-2019, 01:58 AM

+1 for Keller

FSociety · 07-27-2019, 08:52 AM

Sell the exhaust and keep the Downpipes (adds better performance, exhaust tone) and you can quiet it down by modes or exhaust valve open/close operation

3sgte · 07-27-2019, 08:57 AM

Sorted the cold start. Akra has its own valves, which uses OEM electronics, so works like stock. Happy with it as is now.

A Need For Speed · 08-02-2019, 02:33 PM

Quote:

Originally Posted by TexasSurgeon

I have Keller midpipes and downpipes on my M5C with the stock comp exahust

It sounds absolutely amazing.. the perfect sound for the M5C IMO. I am not going to do anything further to the exhaust. It is very loud and anything more would just be obnoxious and over the top.

The other thing that these pipes add is the new sound of the turbos.. they have a sublime loud whistle to them now... music to my ears!

I was at the BMW dealership today and Everyone was in awe at the sound!

The Keller pipes fit perfect on the M5Comp.

Highly recommend!

I will post some videos soon

Ready for those videos to hear that setup as I am considering same.

Questions: Did you get a CEL after installation?

Also do you know if the dealers void your warranty for this (obviously a individual dealership question but how has yours reacted)?

thanks.

Mike

3sgte · 08-04-2019, 10:19 AM

I have the OPF filter on mine (UK car), hence my Akra came with some additional wiring kit, which is supposed to rid the CEL, but unfortunately, we still got the light, hence had to do the remap.

I spoke to Akra UK extensively before purchasing and they just basically said, any issues with warranty, give us a call and we'll sort it with BMW on your behalf. BMW / Akra still work very closely together.

06-12-2019, 09:56 AM	#1
3sgte Private First Class 31 Rep 159 Posts Drives: E90 335D Join Date: Oct 2013 Location: UK iTrader: (2)	Keller Race Cats or Vibrant Performance Resonators ... Hi, Did anyone try the Keller Race Cats with lower downpipes and an aftermarket exhaust? I have their full upper and lower downpipes with a full Akrapovic system and it's a bit too loud for my liking. It's popping and banging with the valves closed Am hoping someone has a similar setup but with the Keller Race Cats so they can give me their opinion. Another option is to weld in some Vibrant Performance Titanium Resonators into the Akrapovic midpipes! Any thoughts? Cheers
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06-13-2019, 11:35 PM	#3
TexasSurgeon Private First Class 174 Rep 183 Posts Drives: 2016 Frozen Black F82 Join Date: Nov 2015 Location: Lakeway, TX iTrader: (0) Garage List 2001 BMW e46 325i [0.00] 2016 BMW M4 [0.00]	Keller mispipes and downpipes! I have Keller midpipes and downpipes on my M5C with the stock comp exahust It sounds absolutely amazing.. the perfect sound for the M5C IMO. I am not going to do anything further to the exhaust. It is very loud and anything more would just be obnoxious and over the top. The other thing that these pipes add is the new sound of the turbos.. they have a sublime loud whistle to them now... music to my ears! I was at the BMW dealership today and Everyone was in awe at the sound! The Keller pipes fit perfect on the M5Comp. Highly recommend! I will post some videos soon __________________ ///2016 Frozen Black F82/Full SO/DCT/MPE/CF Mirror caps/CF spoiler/Dinan coilover suspension
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06-16-2019, 10:00 AM	#4
jc16 Enlisted Member 22 Rep 46 Posts Drives: f90 m5 comp Join Date: May 2019 Location: Ontario iTrader: (0)	how about just sticking the stock upper downpipes back on? and any of you guys have issues with the CEL with the full downpipes? im am currently waiting for upper and lower ipe downpipes and akra exhaust and you guys are getting me worried about the sound
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06-16-2019, 01:20 PM	#5
Catchmeifyoucanf90 Second Lieutenant 54 Rep 210 Posts Drives: f90 white m5 Join Date: Oct 2013 Location: Southern California iTrader: (0)	I have eisenmann race (loudest one) with Keller lower downpipes and m midpipe and I think it's the perfect on loudness. When it's wot, it gets loud and down shifting you get your burbles but as soon as you turn off valves, the ecu takes away the burbles and it's quite again, nothing like stock quiet but you could drive by a cop and he wouldn't even look at you or hear you lol cold start is loud for a while and then it calms down after 10-15 seconds . I'm even thinking about putting on upper Keller's on but too Afraid of it being too loud especially cause i live in California
	Appreciate 0 Quote

06-28-2019, 01:58 AM	#7
mike@x-ph.com Joint Chiefs of Staff 24095 Rep 190,633 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	+1 for Keller __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
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07-27-2019, 08:52 AM	#8
FSociety IG @bmwF9xG80 3813 Rep 7,592 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]	Sell the exhaust and keep the Downpipes (adds better performance, exhaust tone) and you can quiet it down by modes or exhaust valve open/close operation __________________ 60-130mph 6.5s X4M #HCP 60-130mph 5.0s G80 M3 #OrlandoAutowerks Sauce IG: @bmwF9XG80
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07-27-2019, 08:57 AM	#9
3sgte Private First Class 31 Rep 159 Posts Drives: E90 335D Join Date: Oct 2013 Location: UK iTrader: (2)	Sorted the cold start. Akra has its own valves, which uses OEM electronics, so works like stock. Happy with it as is now.
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08-04-2019, 10:19 AM	#11
3sgte Private First Class 31 Rep 159 Posts Drives: E90 335D Join Date: Oct 2013 Location: UK iTrader: (2)	I have the OPF filter on mine (UK car), hence my Akra came with some additional wiring kit, which is supposed to rid the CEL, but unfortunately, we still got the light, hence had to do the remap. I spoke to Akra UK extensively before purchasing and they just basically said, any issues with warranty, give us a call and we'll sort it with BMW on your behalf. BMW / Akra still work very closely together.
	Appreciate 0 Quote