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

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

Developed primarily for track use

as well as the Carbon Fiber Air Box Kit and Stainless Steel Sport Mufflers

479 LB-FT @ 1

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