BMW Recaro Sport 11 way adjustable, and when you tilt them forward they move forward on the sliders about 6 inches at the same time, then return to the original position when leaned back.
I was able to put a fully assembled toilet still in the box in the back seat because my trunk wouldn't close with the box in it.
I did have to make the slider to floor brackets.
The passenger side also lays all the way down flat so the passenger can take a nap on long trips.
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