My buddy wants to lower his 94 E420. The question is which springs should he go with H&R?? also what size pads should i go with if I want it a little lower?

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94 E500 Sport
SOLD:
2002 BMW M3 Coupe 6 Speed.
SOLD:
92 500E Black Pearl, Black.
18" 2 Piece AMG
ASR Defeat
Performance Chip
Crossed Drilled Rotors.