RENNtech Stainless Steel Muffler for 231 - SL 550 mercedes-benz-s-class--222---2018-2020--s450-biturbo-esr1451600 RENNtech's GT-S adjustable lowering kit

RENNtech's GT-S adjustable lowering kit offers not only overall improved aesthetics and an aggressive vehicle stance

and impact testing

Gains: +7HP & +28LB-FT

Valves will stay open even when the car is turned off and restarted

If your vehicle is equipped with factory exhaust valves

RENNtech Stainless Steel Muffler for 231 - SL 550 mercedes-benz-s-class--222---2018-2020--s450-biturbo-esr1451600 RENNtech's GT-S adjustable lowering kitRENNtech Stainless Steel Sport Muffler for 231 SL 550. Gaines: +15HP & 20TQ 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 incredible sound in a lighter than the stock weight exhaust with improved performance. This is accomplished by reducing exhaust system back