Fabtech-Performance proudly presents a comprehensive Longtube header & X-Pipe solution crafted for your W211 E55 AMG or W219 CLS55 AMG. Precision-tig-welded headers made of durable 304 Stainless Steel, backed by a 1 Year Warranty against Cracking or Defects. Elevate your AMG's capabilities with our Longtube Headers, adding a substantial 40-50 HP. Enhance your experience further by pairing them with our renowned "BURBLE" ECU Calibration, OR For a Bit less Agressive Sound our Tried and True Pure Calibration. Fabtech has been delivering the trusted sound and performance for your M113K Since 2011.