BMW 325i WTF?

mick.fr

I was considering swapping my stock muffler for a sport one.
Here is what I discovered today while cleaning my chrome.
Looks like this is a valve that closes itself when..., how the hell do I know lol.





Anybody else who has this thing?
If so can I still change the muffler?

Thanks

cyborg

valve opens 2'nd exhaust pipe at higher revs to give better flow.
it's closed at low revs to give a quiter exhaust.
1st thing to try is to disconnect the vacum pipe to the valve which will open the 2nd pipe all the time.
This alone should change the sound of the exhaust.
If you still want to change the whole exhaust then you can without any problems

JHMEG

Looks to me like you've already got a fairly good one.. what will a 'sport' one do for you?

mick.fr

Thanks Cyborg for the explanation. Did not know.

To JHMEG I was considering to have a muffler to make a bit more noise, not a crazy one, just a bit more.

All the sound in this car is confined under valves and caches etc. When I push hard you clearly hear the engine but almost only from the inside :-)

--amadeus--

mick.fr wrote: »

Thanks Cyborg for the explanation. Did not know.
you clearly hear the engine but almost only from the inside :-)

Yes, please fit a dustbin onto it so that we can all enjoy the noise from the outside rather than just you on the inside...

JHMEG

mick.fr wrote: »

When I push hard you clearly hear the engine but almost only from the inside :-)

But you're completely inside when you push the accelerator?

mick.fr

You know what I meant guys, just a little be more sporty noise.
Nothing outrageous. I am not a dumb.

JHMEG

I know what you mean. If I had that exhaust I would be leaving it on the car. If nothing else, it's cool: Do you know how many cars have butterfly valves in their exhausts? (not many)

mick.fr

JHMEG wrote: »

I know what you mean. If I had that exhaust I would be leaving it on the car. If nothing else, it's cool: Do you know how many cars have butterfly valves in their exhausts? (not many)

Yeah yeah I am thinking a swap would be messy anyway, cause it means I would have to make a hole in the new one to fit this valve arm.
I will concentrate more on a M body kit, which my car does not have.
Not gonna be cheap this one...Will try to find one from a scrapyard around Dublin.

kdevitt

Swapping the exhaust is simple - the mechanism for valve comes off with the backbox, leaving you which a rubber tube which you just need to put out of the way. Go for an eisenmann exhaust when / if you are swapping.

You can buy the sports kit through eBay cheap enough if you're willing to buy parts separately or wait a while for a decent set to come up. I got my full sports kit for last coupe for about €300. Extras like the fogs / mesh etc add up though if they're not included. Your cheapest brand new option is mstyle.co.uk - they'll spray it for you and you just need to fit it, which is a simple job.

jlang

Just open the windows a bit - then you'll hear the roar of your engine much more.

mick.fr

kdevitt wrote: »

Swapping the exhaust is simple - the mechanism for valve comes off with the backbox, leaving you which a rubber tube which you just need to put out of the way. Go for an eisenmann exhaust when / if you are swapping.

You can buy the sports kit through eBay cheap enough if you're willing to buy parts separately or wait a while for a decent set to come up. I got my full sports kit for last coupe for about €300. Extras like the fogs / mesh etc add up though if they're not included. Your cheapest brand new option is mstyle.co.uk - they'll spray it for you and you just need to fit it, which is a simple job.

Yeah I know those guys, mstyle.co.uk, they are the same price than BMW, so pretty pointless.
The full M Style body kit at BMW is 1000 euro as well.
And the other parts are more or less the same price as BMW with shipment included.
My best option so far it to buy a used one from eBay or from a scrapyard here in Dublin.

kdevitt

mick.fr wrote: »

Yeah I know those guys, mstyle.co.uk, they are the same price than BMW, so pretty pointless.
The full M Style body kit at BMW is 1000 euro as well.
And the other parts are more or less the same price as BMW with shipment included.
My best option so far it to buy a used one from eBay or from a scrapyard here in Dublin.

Unless BMW have seriously chopped their prices, Mstyle are alot cheaper.

E92

jlang wrote: »

Just open the windows a bit - then you'll hear the roar of your engine much more.

+1. They sound great as they are. And who cares what they sound like on the outside? The only thing that matters is what you hear when you're driving it!

milltown

E92 wrote: »

+1. They sound great as they are. And who cares what they sound like on the outside? The only thing that matters is what you hear when you're driving it!

And you could leave the bonnet open a bit.

mick.fr

kdevitt wrote: »

Unless BMW have seriously chopped their prices, Mstyle are alot cheaper.

Well check BMW pricing this is the same as those guys
Kidney grills for example at BMW are about 50 euro.
The full M-Tech II kit (Front bumper, sides and rear) is about 1000-1100 euro.

Notch000

you should consider fitting an induction filter, there cheap and will make it roar