not much... you will need a front bumper from a 93.... bolts right up.. the only thing y ou will miss are the small speed panels that sit behind the fenders because on 90 fenders they are not there. other then that it bolts right up.
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RIP my very best friend. DJ aka djzstang1 you will be missed dearly. I love you bro.

1995 240sx se
1992 240sx
1990 240sx se
1991 240sx hicas sr20det MDX
1991 240sx project coupe
1990 240sx drift beater hatch
1993 240sx sr20det