So if I wanted to lower the car one inch how would I do that?

I get new lowering springs for the front then but who to you get the rear to adjust the same ride height.

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2002 X5 4.4i Sport Wheels
2014 X5 35i M Appearance & suspension package
1995 Porsche 993
1972 Porsche 914-6
2020 GLE 450 Twin Turbo
2019 Alfa Stelvio 500hp Quadrifogilo
Many motorcycles