im not nit-picking but the Kerscher version DOES have the curve similar to the performance bumper and 1M bumper. honestly i didnt notice it till PlanBee pointed it out and now that i look at it the Kerscher one "flows" better, BUT thumbs up for LTBMW for making a stateside option.
someone should ask LTBMW if they ca "modifiy" that. im sure if someone has a performance bumper JUST "layin aroouuund" that they will make one