E46 M3 - Anyone completley gutted their backbox?

E46 M3 - Anyone completley gutted their backbox?

Author
Discussion

HannsG

Original Poster:

3,045 posts

134 months

Monday 14th July 2014
quotequote all
I gather this is a very popular mod for increasing the exhaust sound. I have got my hands on a gutted backbox, all the internals have been removed. Its basically a shell.

Has anyone here fitted or had this done to their M?

Thanks

littleredrooster

5,537 posts

196 months

Monday 14th July 2014
quotequote all
Dunno, but I wouldn't want to do an internet search on 'gutted backbox'.

I used to think that a chocolate labrador was a type of dog until the internet arrived...
smile

rallycross

12,787 posts

237 months

Monday 14th July 2014
quotequote all
Oh dear has the E46 M3 really reached this low level of modifications?
I would expect it to be very loud ie annoying when driving along normally making motorway trips a pain in the ear.

Welshbeef

49,633 posts

198 months

Monday 14th July 2014
quotequote all
rallycross said:
Oh dear has the E46 M3 really reached this low level of modifications?
I would expect it to be very loud ie annoying when driving along normally making motorway trips a pain in the ear.
I really hope not - a great car.

No doubt some will drill holes in the air box for more soundz

fathomfive

9,916 posts

190 months

Monday 14th July 2014
quotequote all
littleredrooster said:
Dunno, but I wouldn't want to do an internet search on 'gutted backbox'.

I used to think that a chocolate labrador was a type of dog until the internet arrived...
smile
Must. Not. Google.

R1 Indy

4,382 posts

183 months

Monday 14th July 2014
quotequote all
rallycross said:
Oh dear has the E46 M3 really reached this low level of modifications?
I would expect it to be very loud ie annoying when driving along normally making motorway trips a pain in the ear.
I doubt it, I completely removed the backbox on my clk55, and it's not stupidly loud,

edc

9,234 posts

251 months

Monday 14th July 2014
quotequote all
I had a similar internal modification done to my Boxster exhaust. It keeps the car looking standard and keeps the 550 tailpipe and is actually quieter than most aftermarket exhausts.

aka_kerrly

12,417 posts

210 months

Monday 14th July 2014
quotequote all
Lighten up guys!

OP already has the exhaust, what's the worst that will happen, if it's too loud no doubt there will be demand for it second hand as i presume it saves someone else gutting their exhaust only to regret it.

I for one have no objection...skip to 1min for the more interesting bit
http://www.youtube.com/watch?v=rZEjCBG4kB0

e46acs

548 posts

191 months

Monday 14th July 2014
quotequote all
When I got mine this had already been done. When "giving it the beans" it sounded good, louder, deeper & meaner. clap


But, it was too loud the rest of the time, and at motorway cruising speed it was just a drone that ran through the car. censored

I changed it for an unmolested OEM exhaust and it was instantly much quieter! SOOOOOO much nicer!

Very glad I swapped the de-baffled one for a un-molested OEM one. So my advice, don't do it. nono

SturdyHSV

10,094 posts

167 months

Monday 14th July 2014
quotequote all
It's a very common mod on the criminally quiet E92, and only adds a little volume, so good luck to you smile

BritishRacinGrin

24,640 posts

160 months

Tuesday 15th July 2014
quotequote all
rallycross said:
Oh dear has the E46 M3 really reached this low level of modifications?
I would expect it to be very loud ie annoying when driving along normally making motorway trips a pain in the ear.
Oh dear has PistonHeads really reached this low level of comment? You would expect wrong. The catalytic converter, resonator and center box deal with a surprising amount of the volume. You could remove the backbox altogether and replace it with straight pipe of the same diameter of the standard tailpipes and it wouldn't be 'very loud'.

git-r

969 posts

199 months

Tuesday 15th July 2014
quotequote all
littleredrooster said:
Dunno, but I wouldn't want to do an internet search on 'gutted backbox'.

I used to think that a chocolate labrador was a type of dog until the internet arrived...
smile
LOLOLOL!! smile

joema

2,647 posts

179 months

Wednesday 16th July 2014
quotequote all
BritishRacinGrin said:
rallycross said:
Oh dear has the E46 M3 really reached this low level of modifications?
I would expect it to be very loud ie annoying when driving along normally making motorway trips a pain in the ear.
Oh dear has PistonHeads really reached this low level of comment? You would expect wrong. The catalytic converter, resonator and center box deal with a surprising amount of the volume. You could remove the backbox altogether and replace it with straight pipe of the same diameter of the standard tailpipes and it wouldn't be 'very loud'.
Without the backbox the car is extremely loud.

I had a modified backbox for a bit. sounded good, no drone and only noticable when booting it. Had to take it off for a Bedford trackday as its 101db on the static test so too close for comfort.

Thought it sounded better than any £400 after market job so for £50 worth a go.

JsyM3

98 posts

137 months

Wednesday 16th July 2014
quotequote all
joema said:
"I had a modified backbox for a bit"
Ahem

joema said:
"...only noticable when booting it"
Ouch.

joema said:
"...close for comfort."
Yes, I expect so

joema said:
"... for £50 worth a go."
Selling yourself cheap

Nikko 40691

704 posts

190 months

Wednesday 16th July 2014
quotequote all
git-r said:
littleredrooster said:
Dunno, but I wouldn't want to do an internet search on 'gutted backbox'.

I used to think that a chocolate labrador was a type of dog until the internet arrived...
smile
LOLOLOL!! smile
I'm Google'ing but can't find anything. frown