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      02-02-2012, 06:05 PM   #3
Nate@IND
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Drives: BMW
Join Date: Oct 2006
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KKS Performance F10 M5 exhaust

KKS Performance
Made in Germany
Rear clamp on section
Valve control

Quote:
Originally Posted by Z4MGermany View Post
Hi guys, just wanted to show the new valve-controlled axle-back by KKS-Performance

I've got a button to control the valves autonomous.
Downpipes are the next thing to come these days :-)
We have not made WOT runs as the car is factory new and nit run-in.

The reving-noise was raised from 93db to 108db with open valves.
Closed valves mean stock noise levels.

Here's some more info:
it's a 3" axle-back, it doesn't make sense to change the piping from downpipes to rear axle as it is full 3" stock and has 2 very very small mufflers.
The biggest restriction are the downpipes with 4 (2 on each side) restrictive catalsysts.
I'm getting new SS downpipes with 2 (1 on each side) 200cpi metallic cats.
No engine light, a decent hp gain and more noise is promised :-)
KKS delibers a button or remote to control the exhaust .
The stock exhaust valves open/close at certain rpms or WOT so you can't control them the same way like the KKS exhaust.
That's the big difference between other bolt-on exhausts and this one.
The weight is same as stock as far as I can tell.



Updated with video:




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Last edited by Nate@IND; 02-02-2012 at 06:39 PM..
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