I can only comment from my observations in removing my bumperettes -- and I am no expert, I'm no engineer!


The steel bumper is of course back in place, just without the bumperettes. It seems to me that, if rear-ended by another vehicle, the bumperettes were too low to come into contact first anyway. I only compared to my SUV (range rover), and the bumperettes would have met the undercarriage of the rover, not the bumper, The steel bumper on the Porsche sits slightly higher than the license plate, and the steel bumper would protect (within reason) the exhaust system and then the engine. On a low-speed crash, I think the absence of the bumperettes would only cause more damage to my plastic bumper and license plate. The steel bumper is still as it was before. IF a low-speed crash catches the bumperettes first (if the vehicle that hits the Porsche has a low front bumper) then perhaps the plastic bumper is spared. If it is a high speed crash, then the bumperettes are irrelevant, if the steel bumper is compromised, exhaust and engine is next.


But again, I am no engineer; maybe someone has measurements (off-ground height) of Porsche's rear steel bumper, compared to other vehicles.