For a 1989 420 SEL the front pads come in 8MM(1 burl), 13MM(2 burls), 18MM (3 burls) and 23MM (4 burls)

The rear come in 9.5MM (1 burl), 14MM (2 burls), 19MM (3 burls)

These are for a car with no hydralic suspension.

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1989 420 SEL