[mcalbala]

Flatrun tires, forget about the doughnut spare

More markings on SRT-8 that differentiate it from other 300s

A wood dash (many folks are doing this aftermarket already, as I did)

Touch screen or voice activated navigation screen

A larger Sun Roof or possibly a T-Roof

To lighten up, use composite/graphite materials in the body on the SRT-8

Get the tire manufacturers to make 20" snows, and couple with a winter tire storage program (dealers house summer tires for SRT-8 owners, pricing to provide winter rims and tires plus storage cost would have to be worked out, but would make for alot of happy owners who live in the north.