Probably to get the M suspension etc, I didn't get it in my current one. The iS is basically a full load car with a tweaked boost system. I would however be very hard on the salesman and get the price down as far as possible. (Using the comparison of the "i" with dinan as leverage).
The iS may also have a higher resale value down the road .....as some day I will have to relinquish my need for an overpowered skateboard and get a "normal" vehicle. (or not !!)
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Member ZSCCA 2009 Z4 s35i with Dinan Stage II software, Sport and Exec packages, 19" 296 rims , a stubby and mud flaps
'03 Z4 3.0i Sterling Grey (Hers)
'01 Z3 3.0i Sapphire Black, M sport package (Mine)
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