RENNtech | Downpipes w/200 Cell Sport Catalytic Converter | W463 | G550 | 4.0L V8 BiTurbo | M176 hht They are made in one

They are made in one single piece with no welded joints in the corners

Optimized fitment

It is also available for vehicles with out the optional electronic valve system

X167 - GLS 63 AMG

With the proprietary RENNtech ECU Tuning the W463 - G63 AMG gains up to +88 HP and +66 LB-FT (+75 WHP and +56 WTQ)

RENNtech | Downpipes w/200 Cell Sport Catalytic Converter | W463 | G550 | 4.0L V8 BiTurbo | M176 hht They are made in oneRENNtech Stainless Steel Downpipes with 200 Cell Sport Catalytic Converters for W463 G550 RENNtech Downpipes are constructed from T304 High Strength Stainless Steel and are equipped with 200 Cell Sport Catalytic Converters. With the replacement of the stock downpipes we improve performance, reduce back pressure, increase initial turbo spooling and enhance sound output. RENNtech products are manufactured to perfectly match the stock G550 4x4 exhaust