Originally Posted by jagman
I already have the slip-on on my 2008 E92 M3 but would like to upgrade to the full Evolution exhaust. I've read akra can do 200 cell cats. Please pm me options and prices.
You can upgrade to a completely catless system with no resonators (GT4) or to reg Evo system like we did on this car past week that comes with the resonators and 100cpsi cats