3.5 inch turbo exit to 3 inch inner diameter throughout for improved exhaust flow and performance
Manufactured from high quality 304 stainless steel with thermally wrapped heat shields to reduce radiant heat transfer
Up to 70% lighter than OEM units, reducing back pressure and turbo lag
Enhanced exhaust note and throttle response for a more aggressive driving experience
Available options for high flow catalytic converters and catted versions to meet competition requirements
Summarized by Shop
3.5” entry diameter
Get ready for improved performance and sound with the ModalWorks M177 aftermarket downpipes for the 2017+ GLC63. These downpipes improve performance, reduce back pressure, reduce initial turbo lag and greatly enhance the exhaust note. With smooth exhaust transitions and integrated heat shields, we offer some of the be