I see so many AMG exhaust on ebay is there a Mercedes with center exit exhaust built ? Also anyone know which V8 airbox will work on our xfires? I am begging for performance thought of spending big dough through kleemans or Ctd but can't fins any info I would drop 10k to get my car to actually run. I got it to handle but I got spanked by an LT1 camaro and it hurts , I traded in an ls1 car on my x-fire. I feel useless.