Catless VRSF DP W MPE. sound after install.

erzenble · 09-22-2022, 08:17 PM

Hey I am getting a rasp/vibration during cold start and also during shifting at higher rpms.

I know there are tons of threads about this issue and I have read through tons of them. I'm wondering if the noise I'm getting maybe caused by me bending the midpipe flange up when I was removing the stock DP. I couldn't get it to bend back properly. I just tightened the crap out of the clamp.

Here are a couple videos of the noise. It doesn't sound normal at all and is embarrassing to drive. It's much louder in person.

https://youtube.com/shorts/W5m3lQn8zPs?feature=share

https://youtube.com/shorts/QiiZwav-RdY?feature=share

erzenble · 09-22-2022, 08:23 PM

Here's another video.

B58 · 09-22-2022, 10:34 PM

Stock mid pipe or the resonators have been deleted?

erzenble · 09-23-2022, 05:01 AM

Quote:

Originally Posted by B58

Stock mid pipe or the resonators have been deleted?

Stock Mppsk exhaust. Not sure if there are resonators or not.

B58 · 09-23-2022, 09:13 AM

Quote:

Originally Posted by erzenble

Quote:

Originally Posted by B58

Stock mid pipe or the resonators have been deleted?

Stock Mppsk exhaust. Not sure if there are resonators or not.

Ah okay. I thought you said MPE according to your title. Catless dp with the MPPSK will always sound raspy.

XxThe_RemedyXx · 09-23-2022, 10:20 AM

Why is it embarrassing? I think it sounds great!

nosam1g · 09-23-2022, 03:55 PM

dude open the valve lol .. thats with valves closed

it sounds normal .. like all downpipes and mpe .. there is a raspe with valves closed once u open the valves its gone

erzenble · 09-23-2022, 07:36 PM

Quote:

Originally Posted by B58

Ah okay. I thought you said MPE according to your title. Catless dp with the MPPSK will always sound raspy.

Ah wasn't sure there was a difference in mppsk exaust and mpe. Im ok with raspy but it sounds more like a rattling metalic sound. You can't tell as easily in the video.

erzenble · 09-23-2022, 07:38 PM

Quote:

Originally Posted by XxThe_RemedyXx

Why is it embarrassing? I think it sounds great!

It's hard to tell in the video but it sounds like a metalic noise instead of a rasp.

erzenble · 09-23-2022, 07:39 PM

Quote:

Originally Posted by nosam1g

dude open the valve lol .. thats with valves closed

it sounds normal .. like all downpipes and mpe .. there is a raspe with valves closed once u open the valves its gone

With valves open it sounds 10x louder and the metallic sound is very noticable. In The video I'm driving around I have the valves open.

nosam1g · 09-23-2022, 07:57 PM

thats normal lol nothing to worry about

erzenble · 09-24-2022, 08:21 PM

Thinking I'm going to sell the catless DP. Anyone know if a VRSF high flow would get rid of the rasp? Or do I need to change the exaust/add a resonator?

talontdone · 09-24-2022, 11:32 PM

Quote:

Originally Posted by erzenble

Thinking I'm going to sell the catless DP. Anyone know if a VRSF high flow would get rid of the rasp? Or do I need to change the exaust/add a resonator?

You willl still have rasp at low rpms… but it will go away at higher rpms

Jay5k · 09-25-2022, 02:58 AM

Quote:

Originally Posted by erzenble

Thinking I'm going to sell the catless DP. Anyone know if a VRSF high flow would get rid of the rasp? Or do I need to change the exaust/add a resonator?

Add a Vibrant 1142 3" Ultra Quiet Resonator. That will get rid of the rasp. Keep the catless DP.

09-22-2022, 08:17 PM	#1
erzenble Private 5 Rep 96 Posts Drives: 2011 335xi m sport PE Join Date: Sep 2018 Location: CDA Idaho iTrader: (0)	Catless VRSF DP W MPE. sound after install. Hey I am getting a rasp/vibration during cold start and also during shifting at higher rpms. I know there are tons of threads about this issue and I have read through tons of them. I'm wondering if the noise I'm getting maybe caused by me bending the midpipe flange up when I was removing the stock DP. I couldn't get it to bend back properly. I just tightened the crap out of the clamp. Here are a couple videos of the noise. It doesn't sound normal at all and is embarrassing to drive. It's much louder in person. https://youtube.com/shorts/W5m3lQn8zPs?feature=share https://youtube.com/shorts/QiiZwav-RdY?feature=share
	Appreciate 0 Tweet Quote

09-22-2022, 08:23 PM	#2
erzenble Private 5 Rep 96 Posts Drives: 2011 335xi m sport PE Join Date: Sep 2018 Location: CDA Idaho iTrader: (0)	Here's another video.
	Appreciate 0 Quote

09-22-2022, 10:34 PM	#3
B58 Major 558 Rep 1,457 Posts Drives: 922 Turbo Join Date: May 2018 Location: USA iTrader: (1)	Stock mid pipe or the resonators have been deleted?
	Appreciate 0 Quote

09-23-2022, 10:20 AM	#6
XxThe_RemedyXx Colonel 967 Rep 2,655 Posts Drives: 2016 340i xDrive Join Date: Aug 2009 Location: Westchester, NY iTrader: (0)	Why is it embarrassing? I think it sounds great! __________________ 2016 340i xDrive - BM3 Stage 2 93 OTS - xHP Transmission Tune Stage 2 - B58TU HPFP - Bilstein B14 - VRSF Catless DP - Kyostar CAI
	Appreciate 0 Quote

09-23-2022, 03:55 PM	#7
nosam1g First Lieutenant 66 Rep 329 Posts Drives: 2018 340i Join Date: Dec 2021 Location: WEST iTrader: (0)	dude open the valve lol .. thats with valves closed it sounds normal .. like all downpipes and mpe .. there is a raspe with valves closed once u open the valves its gone __________________ 2018 340i - MHD CUSTOM TUNE, PURE850, DORCH STG2.5,MHD-FLEX-FUEL, M-PERF LSD, XHP Stg 2, CSF Heat Exchanger, M-Perf EXHAUST Mid Pipe BACK, Ross Racing Oil Catch Can, Evo Race Work Downpipe, PURE Inlet, DINAN Intake, VRSF Chargepipe 2011 335is - SOLD Last edited by nosam1g; 09-23-2022 at 04:15 PM..
	Appreciate 0 Quote

09-23-2022, 07:57 PM	#11
nosam1g First Lieutenant 66 Rep 329 Posts Drives: 2018 340i Join Date: Dec 2021 Location: WEST iTrader: (0)	thats normal lol nothing to worry about __________________ 2018 340i - MHD CUSTOM TUNE, PURE850, DORCH STG2.5,MHD-FLEX-FUEL, M-PERF LSD, XHP Stg 2, CSF Heat Exchanger, M-Perf EXHAUST Mid Pipe BACK, Ross Racing Oil Catch Can, Evo Race Work Downpipe, PURE Inlet, DINAN Intake, VRSF Chargepipe 2011 335is - SOLD
	Appreciate 0 Quote

09-24-2022, 08:21 PM	#12
erzenble Private 5 Rep 96 Posts Drives: 2011 335xi m sport PE Join Date: Sep 2018 Location: CDA Idaho iTrader: (0)	Thinking I'm going to sell the catless DP. Anyone know if a VRSF high flow would get rid of the rasp? Or do I need to change the exaust/add a resonator?
	Appreciate 0 Quote