Dodge has a kit to mount the seats about 3" lower.

A FL Viper club member installed Sparco seats to fit inside. There's tons of legroom, at 6' 1", I can't reach the pedals with the seat slid back.

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'03 X5 4.4 Sport, last of the M62s (8-03 build date)
I believe in deadication to craftmanship in a world of mediocrity!