Catless Downpipe too much for dinan exhaust?

cyal8r · 12-02-2020, 02:30 PM

.

dradernh · 12-02-2020, 06:06 PM

Quote:

Originally Posted by nawfoo

Might be 15 - 25% louder with the catless downpipe

How do you measure the sound to come up with a percentage difference – e.g., with a decibel meter in a specific and relevant position in the car under cruising conditions, moderate acceleration, or hard acceleration, whichever is more important to you?

supersam · 12-03-2020, 07:35 PM

Pm'd

mike@x-ph.com · 12-07-2020, 08:17 AM

I recommend getting a catted downpipe with aftermarket exhausts.

cyal8r · 12-07-2020, 09:53 AM

Quote:

Originally Posted by mike@x-ph.com

I recommend getting a catted downpipe with aftermarket exhausts.

What's gonna be the difference buying a catted one? Isn't the stock one catted?

cyal8r · 12-07-2020, 10:06 AM

Quote:

Originally Posted by nawfoo

Quote:

Originally Posted by cyal8r

What's gonna be the difference buying a catted one? Isn't the stock one catted?

Aftermarket high flow cat, less restrictive than stock.

Is it actually a big difference?

mike@x-ph.com · 12-07-2020, 05:07 PM

Quote:

Originally Posted by cyal8r

What's gonna be the difference buying a catted one? Isn't the stock one catted?

Quote:

Originally Posted by nawfoo

Aftermarket high flow cat, less restrictive than stock.

Quote:

Originally Posted by cyal8r

Is it actually a big difference?

more airflow, power, and deeper and slightly louder exhaust tone.

12-02-2020, 02:30 PM	#1
cyal8r Private 10 Rep 59 Posts Drives: 2018 BMW X3 M40i Join Date: Oct 2020 Location: Boston iTrader: (0) Garage List 2018 BMW X3 M40i [10.00]	Catless Downpipe too much for dinan exhaust? . __________________ Current: 2018 X3 M40i Past: 2018 M240i Last edited by cyal8r; 07-05-2021 at 05:06 PM.. Reason: sold car
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12-03-2020, 07:35 PM	#3
supersam Da Baus 283 Rep 259 Posts Drives: F87 6MT, RA, E46 Join Date: Feb 2016 Location: NY/MI iTrader: (0)	Pm'd __________________ M2 LBB/6MT/VFstg2/V1 stealth/JRC valve delete/Dinan/ Fabspeed/Wagner/ER/Eibach/UCP/RTD RA Evo X/WhalenTuned/AMS/ETS/UR/AEM/Swift/RRM/VIS/ID E46 330ci --> S54 M3 xplant vzv 3bananas (retired)
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12-07-2020, 08:17 AM	#4
mike@x-ph.com Joint Chiefs of Staff 24033 Rep 190,539 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	I recommend getting a catted downpipe with aftermarket exhausts. __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
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