RENNtech | Stainless Steel Muffler | 216-CL 63/65 AMG | 221-S 63/65 AMG| M156 -engine mercedes-benz-cls-class--218---2015-2018--cls63-amg-biturbo-4matic-esr2890927 Our performance package includes our

Our performance package includes our proprietary ECU tune in addition to our  full carbon fiber airbox for a gain of +20 HP and +21 LB-FT over stock

Developed primarily for track use

GTS (MY2019+)

and you can take this further with the optional link pipe

The R1 performance package includes our proprietary ECU tune and higher efficiency intercooler pump for increased

RENNtech | Stainless Steel Muffler | 216-CL 63/65 AMG | 221-S 63/65 AMG| M156 -engine mercedes-benz-cls-class--218---2015-2018--cls63-amg-biturbo-4matic-esr2890927 Our performance package includes ourRENNtech Stainless Steel Sport Muffler for 216 CL 63 AMG & 221 S 63 AMG for M156 Series. Gains: up to 10HP & 15 TQ RENNtech stainless steel (SS) sport mufflers are hand made and rigorously tested to remove any unwanted resonances in the cabin to deliver a deep sound that keeps with the character of a luxury performance vehicle. Our mufflers offer lighter weight than the stock exhaust and improve performance by reducing exhaust back pressure and