CSL exhaust "Rasp" ??

[Windowlicker]

Hi there,

Question is, which part of th eexhaust system is it that generates the raspy metallic noise
/ Is it the centre section, the backbox?
I like the noise, sounds quite rude, :whistle: but would replacing the offending section with an aftermarket item, Miltek for example, retain the charcteristic noise but change it to a deeper sound, rather than being so tinny?
Thank ya, in advance.

[SMD]

I think the Rasp is from the Backbox!

The rattle is from the Cats! :wanker:

[s.mac]

Can only comment on experience in my M3, i had a supersprint lightweight back box and the rasp went, sounded great when giving it some but did my head in when not, deep boom at mid range, put an x pipe on and no improvement although there is an x pipe with resonator so that might of got the rasp back.

[Andyk]

The rattle is from the Cats! :wanker:

Is that what I get when car is cold.

[Windowlicker]

The rattle is from the Cats! :wanker:

Is that what I get when car is cold.

Mine is the same when cold, lift off and it rattles and also you get dull thudding noises, sounds a bit like backfires, just the wadding/internals moving back and forth i guess, until it expands with the heat , then it stops.

Has anyone fitted just a miltek backbox? if so did it keep or loose the rasp?
Cheers

[dave1]

ask glendog to confirm but i think the milltek loses the rasp

[Andyk]

The rattle is from the Cats! :wanker:

Is that what I get when car is cold.

Mine is the same when cold, lift off and it rattles and also you get dull thudding noises, sounds a bit like backfires, just the wadding/internals moving back and forth i guess, until it expands with the heat , then it stops.

Cheers

Yep thats the noise, get that as well...

[glendog74]

Has anyone fitted just a miltek backbox? if so did it keep or loose the rasp?

I have a full Miltek system and the there is no rasp anymore but instead a deeper, dare i say 'meatier' tone. I like it but at times do miss the rasp.

As already said, It is the backbox that causes the rasp i believe. When i had the 100cell cats fitted, it simply added a din at certain revs noisewise! :smt012

I would love to have a Supersprint or Gruppe M fitted but they are just that little bit too much for everyday driving and carrying the missus around! :whistle:

[E46ACS]

I have been thiking about an exhaust, but want to hear others before I decide.

[glendog74]

I also had a really bad rattle when i had the 100cell cat fitted - i think it was the two cat sections touching or maybe resonating against the exhaust/transmission tunnel. It lessened when warm but never completely went away :banghead:

[SMD]

I think the standard CSL exhaust is perfect! :smokin:

Would maybe do the cats and a re map a some point but not really bothered! :whistle:

[glendog74]

I wouldn't have bothered doing mine knowing what i know now...

The £2k would have been much better put towards my APs - these really do improve the CSL :smt023

[SMD]

I wouldn't have bothered doing mine knowing what i know now...

The £2k would have been much better put towards my APs - these really do improve the CSL :smt023

Yea but once you have done Brakes and KW's! :whistle:

Might aswell spend £2k on track days and ring trips! :thumbs:

[bryce]

I love the standard note, but would be good to hear some aftermarkets.

Brakes will come first for me though.

[Andyk]

I think the standard CSL exhaust is perfect! :smokin:

Would maybe do the cats and a re map a some point but not really bothered! :whistle:

Agree SMD.. standard is fine. Noise is there when you want it without taking over.......A chap in my street has a Gruppe on his CSL and it sounds terriblr....far to loud and take away the character of the CSL.....plus far to loud for most tracks I would imagine.