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I'm interested to see if there was a significant power loss with the valves in the Xforce closed vs open. Car sounds good (makes me want to get LTs) and agreed, very clean install looks like.

Nice results!

-J
 

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It is really nice to open/close on demand. I drive a fair bit with it open, but it's a little resonant sitting at stoplights, so I close it then. And once cruising on the highway, they're always closed, then it's almost like stock.
(One of the) best parts about the exhaust. When I start it up before leaving for work, with the valves closed, it only has a slightly louder burble, almost imperceptible. My neighbor's S6 is louder. On the way to work on the highway, it's so quiet, like someone just turned down the bass and mid on the radio that is the engine.

I wish I got the updated looking fobs like I see on XForce's website but oh well.
 
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