The Jalopnik commentariat knowledge base never ceases to amaze! Today Jason asked what those weird bumper overrider things were on vintage cars, and then he got an answer.
A good answer, too, from reader Yuranium. No snark, just the answer.
They are to keep cars with different bumper heights from running into your body work when they tap your car while parking. My Dad’s Etype always had dings around the leading edge of the bonnet because some jerk driving a Rolls Royce at his work would always park by feel, and the bumpers on the Jag were a good 4-6" below the bottom edge of the Rolls’ bumper.
And now we know!
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