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      07-25-2016, 03:45 PM   #32
David@ActiveAutowerke
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Drives: M2
Join Date: Jan 2016
Location: Miami, FL

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Quote:
Originally Posted by mike@x-ph.com View Post
Sounds great
Thanks Mike!

Quote:
Originally Posted by BD_F87 View Post
Any updates?
We had a couple of the screws that mount the valve motor vibrate loose after about 1k miles on the car. We retorqued them with loctite this time around to see if it holds up. Since the valve assembly we are using is 3" and not 2.5" like the OEM valve we had to have it made to fit the OEM valve motor and therefore the entire piece is something custom. This is part of the reason longevity testing is so important.

Other than that so far so good. We will also be adding an additional center hanger because after the track day the mid pipe had moved about 1/2" and was touching the center brace. The OEM exhaust only uses a single hanger up front by the transmission along with the two rear muffler mounts. With the larger diameter pipe our clearances are much tighter so a third mount will be necessary to ensure proper clearances under all conditions. Other than that, we have about 1200 miles on the exhaust with no other issues. Within the next couple weeks we'll be rebuilding a second system with the third hanger along with a slight revision to the rear routing to make flow and production a little easier.

I will say that on track, the car sounds amazing with the valve open!
Appreciate 2