1M Akrapovic Southern BM Install

[M1one1M]

Originally Posted by AlpineM3E92

Correct.

Wanted to keep the cats. It is effectively hard wired on NOISY

I was under the impression from everything that I have read about the system that if you didn't opt for the wireless kit, Akra puts a blocking plate in its place, which means that all exhaust gasses pass through the muffler?

[MrBlonde]

Originally Posted by sparoz

Only about 15hp - ie 10kw. The downpipe have a cat that is only 40-50% flow, ie replace that to a sports cat downpipe, or catless will yield quite a bit of gain.

I reckon you'll have to prove that on a dyno. :-)

[Alpine*]

Originally Posted by M1one1M

I was under the impression from everything that I have read about the system that if you didn't opt for the wireless kit, Akra puts a blocking plate in its place, which means that all exhaust gasses pass through the muffler?

You are 100% correct, but ours is goooonnnneee so it is in bypass constantly

[sparoz]

Originally Posted by MrBlonde

I reckon you'll have to prove that on a dyno. :-)

hahaha - emailed AR to see if I can put in a 100 cel cat - which complies to euro 4 which complies to the law here still - at 95% flow.

[M1one1M]

Originally Posted by AlpineM3E92

You are 100% correct, but ours is goooonnnneee so it is in bypass constantly

Oh really?

Were there any pictures taken of this piece or the process of cutting it out.
How was it done?

Good way of saving yourself an extra $800 if you don't mind having it loud constantly.

Cheers

[Gumball]

Originally Posted by sparoz

hahaha - emailed AR to see if I can put in a 100 cel cat - which complies to euro 4 which complies to the law here still - at 95% flow.

Just get the catless downpipes - they are not much louder and no one is going to check it anyway - its not a wrx or a skyline. I gained 15 rwkw with downpipes with the standard exhaust.

I would not bother swapping them out with catted downpipes you would be looking at $500 install the cost of the downpipes for very small gains.

[sparoz]

Originally Posted by Gumball

Just get the catless downpipes - they are not much louder and no one is going to check it anyway - its not a wrx or a skyline. I gained 15 rwkw with downpipes with the standard exhaust.

I would not bother swapping them out with catted downpipes you would be looking at $500 install the cost of the downpipes for very small gains.

From what I gathered, the 100 cells cats shouldn't only be 10% worse off than straight down pipes. It will cost twice as much though. My only concern was the exhaust smell I was reading about, plus potential insurance problem.

[Gumball]

Mine does not smell, its noisy on start up though. But settles down in a minute or so. Build a monster 1m!! RB turbos next !!

Insurance - god knows - just specify it, i have not done it though.. Gotta do it next renewal i spose...

[sparoz]

Originally Posted by Gumball

Mine does not smell, its noisy on start up though. But settles down in a minute or so. Build a monster 1m!! RB turbos next !!

Insurance - god knows - just specify it, i have not done it though.. Gotta do it next renewal i spose...

I am all good if it doesn't smell. Just need to have a cat somewhere to make it legal. Insurance company always try to get out of paying out.

[Zuzu]

My 135i smelled with the centre cats removed..

[Alpine*]

Originally Posted by M1one1M

Oh really?

Were there any pictures taken of this piece or the process of cutting it out.
How was it done?

Good way of saving yourself an extra $800 if you don't mind having it loud constantly.

Cheers

M1, here are a couple of shots that may explain things a little better than words.






So one could then later remove the dummy pipe and simply insert the butterfly section. (if one wanted too of course )

[andrew@southernBM]

[Alpine*]

After driving in front of the 1M for almost 5 hours today, and looking in the mirrors, I like them alot, they look exactly how BMW SHOULD have made them, VERY mean.

A relatively cheap upgrade for those who care about aesthetics.

[takahashi]

Originally Posted by andrew@southernBM

I so want this!!

[MrBlonde]

Downpipes with cats = bad idea. Go catless, that's the whole point.

There is no smell from catless, it's another American myth.

[sparoz]

Originally Posted by MrBlonde

Downpipes with cats = bad idea. Go catless, that's the whole point.

There is no smell from catless, it's another American myth.

I might double check my policy then - the akra downpipes look fantastic. Unfortunately, I need to make up my mind soon otherwise I won't get it before christmas.

[BMW86]

I wouldn't say there is no smell. You definitely don't want to leave your car running for more than a few seconds inside a closed garage when you get home. I have done this before...

[Alpine*]

Another sound bite........

[MrBlonde]

Originally Posted by BMW86

I wouldn't say there is no smell. You definitely don't want to leave your car running for more than a few seconds inside a closed garage when you get home. I have done this before...

I think you'll find that goes for any car :-)

[BMW86]

Originally Posted by MrBlonde

I think you'll find that goes for any car :-)

Not like this.. I'm talking about nearly passing out

[BMW86]

Originally Posted by AlpineM3E92

Another sound bite........

[timbo_3101]

Alpine omg this thread is out of control. Soon we will all have MotoGP safety cars!
It is difficult not to be excited ...

Would it be possible to share details re:
(a) drone (eg 110kmh at 2200rpm), and
(b) costs involved?

Thanks.