How is that aluminum exhaust holding up? Mileage on it or track events?
The aluminum exhaust is holding up quite well. No issues as of yet. But there is only about 1,000 miles of mixed driving on the system. Everything from autoX and drag races to around town driving and even some short road trips (about 50 or so miles non stop). The entire system weighs roughly 13#. And it could of been less without the center resonator. Even so, you can pick it up and twirl it like a big baton. Also, thanks.
With the Kameari twin idlers, does that mean you don't have to run the tensioner/slack side guide?
Yes, that is correct. You replace the tensioner with a solid mounted gear. And the slack side guide with a moveable gear to set the tension.