[ayau]

Originally Posted by Shankenstein

Absolutely, it reduces lift! Like a golf ball, therefore woooosh! \s

The dimples will initiate a turbulent boundary layer, which will hug the diffuser further up the rear. The higher it goes, the less wake cross-section. I expect the contribution of the dimples is very low.

The main way the muffler reduces lift isby providing a smooth transition between the pumpkin and the bumper. They could have left it level, but angling it will prevent the flow from getting too caught up in the rear suspension area. I'd hope that the aftermarket exhaust kits maintain that slope, but most welders are more concerned with fitment than aero.

Can you explain the text in bold in layman's terms? I've always wondered what those dimples were used for.