Axleback + Catless DPs = How loud?

SlickShift · 12-30-2009, 10:03 AM

So I already have an axleback, and now I want some downpipes.

My exhaust isn't overly loud...just a little drone around 2200RPM. Obviously "loud" is a subjective term, but everyone knows how annoying a droning exhaust is. So who has this combo and how loud is it? Thanks!

escobar929 · 12-30-2009, 10:15 AM

why not change the mid pipe first?

BSM 135i · 12-30-2009, 10:40 AM

What axelback do you have? I've been wondering the same question with my aFe exhaust....

bradford · 12-30-2009, 11:35 AM

Quote:

Originally Posted by escobar929

why not change the mid pipe first?

Cause it's the DPs that make power.

bimmerboy · 12-30-2009, 12:14 PM

it depends. With an already loud axleback (afe, berk), adding catless downpipes will be pretty loud, but with quieter axlebacks (maddad, bmw performance) it should sound pretty nice.

BSM 135i · 12-30-2009, 12:25 PM

Quote:

Originally Posted by bimmerboy

it depends. With an already loud axleback (afe, berk), adding catless downpipes will be pretty loud, but with quieter axlebacks (maddad, bmw performance) it should sound pretty nice.

IMO aFe's isn't LOUD but that's because of the cats, so if I ran catless dp's there would still be the secondary cats. Would it be REALLY loud?

BerkTechnology · 12-30-2009, 01:00 PM

Depends on the axleback. If you have a Berk or one of the copies of the Berk then it will be loud. If you have a axleback with a muffler and they use quality packing materials and have adequate internal volume then it'll sound pretty good.

ar design · 12-30-2009, 03:41 PM

Quote:

Originally Posted by bradford

Cause it's the DPs that make power.

My135 · 12-30-2009, 04:27 PM

DP also cause warranty headache too.

ar design · 12-30-2009, 04:29 PM

Quote:

Originally Posted by My135

DP also cause warranty headache too.

Just like any other modification to your car?

SlickShift · 12-30-2009, 04:42 PM

Quote:

Originally Posted by BSM 135i

What axelback do you have? I've been wondering the same question with my aFe exhaust....

I have the Magnaflow axleback (similar to the maddad) with a full muffler. It isn't too loud at the moment. I mean, I forget it's there sometimes. I guess if I'm going to get some DPs, it's the right one to have.

And there's got to be someone on here with DPs and an axleback...

bradford · 12-30-2009, 05:53 PM

Quote:

Originally Posted by SlickShift

And there's got to be someone on here with DPs and an axleback...

SpacE82 has a full CP-E non-resonated setup with their catless DPs. I met up with him last week to check out the sound/volume level.

It's pretty loud in general, but the noise isn't really offensive outside of the natural resonance around 2100-2300rpm. In that zone it is very boomy inside the cabin. You can work around that though, once you're used to it.

kirby135i · 12-31-2009, 11:17 AM

I just installed a full system...its def loud...like bradford said, around 2k rpm range it booms...

BSM 135i · 12-31-2009, 05:07 PM

Quote:

Originally Posted by kirby135i

I just installed a full system...its def loud...like bradford said, around 2k rpm range it booms...

sound clips or BAN!

12-30-2009, 10:03 AM	#1
SlickShift Lieutenant Colonel 323 Rep 1,804 Posts Drives: '11 BMW E90 M3 ZCP, '21 X5 ZMP Join Date: May 2007 Location: Atlanta iTrader: (7)	Axleback + Catless DPs = How loud? So I already have an axleback, and now I want some downpipes. My exhaust isn't overly loud...just a little drone around 2200RPM. Obviously "loud" is a subjective term, but everyone knows how annoying a droning exhaust is. So who has this combo and how loud is it? Thanks! __________________ -Nick 2018 BMW 440i - M Sport, Exec Glacier Silver Metallic/Coral Red Dakota Retired: '00 323i, '06 325Ci, '09 135i, '06 Z4M Roadster, '93 525i, '76 2002, '14 X1, '14 M235i, '16 X4, '16 435i
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12-30-2009, 10:15 AM	#2
escobar929 Brigadier General 154 Rep 4,528 Posts Drives: M2 CS Join Date: Aug 2009 Location: Hollywood, FL iTrader: (14) Garage List 2020 M2 CS [10.00] 2020 M240i [0.00]	why not change the mid pipe first?
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12-30-2009, 10:40 AM	#3
BSM 135i Colonel 208 Rep 2,229 Posts Drives: 08' BSM E82 Join Date: Dec 2008 Location: Cali iTrader: (23)	What axelback do you have? I've been wondering the same question with my aFe exhaust....
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12-30-2009, 12:14 PM	#5
bimmerboy Captain 23 Rep 601 Posts Drives: 135i Join Date: Jan 2009 Location: Bay Area iTrader: (0)	it depends. With an already loud axleback (afe, berk), adding catless downpipes will be pretty loud, but with quieter axlebacks (maddad, bmw performance) it should sound pretty nice. __________________ *--2009 BSM 135i--* -Manual, Sport Package, BMW Assist
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12-30-2009, 01:00 PM	#7
BerkTechnology Lieutenant Colonel 223 Rep 1,565 Posts Drives: Fast Join Date: May 2008 Location: Irvine, CA iTrader: (1)	Depends on the axleback. If you have a Berk or one of the copies of the Berk then it will be loud. If you have a axleback with a muffler and they use quality packing materials and have adequate internal volume then it'll sound pretty good.
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12-30-2009, 04:27 PM	#9
My135 Lieutenant Colonel 85 Rep 1,609 Posts Drives: Join Date: Mar 2008 iTrader: (0)	DP also cause warranty headache too. __________________ 7/08 135 Coupe, Crimson Red, 6 SP, Sport, Taupe Lette/Aluminum. Performance Mods: JB4 on Map 5, BMS DP Fix V3, Injen polished intake, AR Catless DP, Maddad resonated mid-pipes, aFe exhaust polished tips, ST Suspension Coil Over and Hotchkis front sway bar. Others: BMS OCC, BT Scanner, Mud Flap. Next Mods: AA Front Strut Brace.
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12-31-2009, 11:17 AM	#13
kirby135i Lieutenant 15 Rep 506 Posts Drives: bmw Join Date: Jun 2009 Location: here iTrader: (1)	I just installed a full system...its def loud...like bradford said, around 2k rpm range it booms...
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