For those of you who aren't up to paying thousands of dollars for a factory or aftermarket system or simply do not want to remove your shaker 500/1000 system I have something that is kind of neat. A TomTom 130S fits perfectly so neatly where the Shelby dash plaque goes right between the two air vents. The round adhesive disk does not stick completely flat as the dash is curved. However it sticks perfectly good enough to hold the TomTom GPS right there in the center flat as a button. It looks really neat and cute too plus no goofy windshield mount and the adhesive disk really only sticks enough in the center to hold the TomTom as it will pop right off if you pull on it. Oh and I got mine from TigerDirect with an email coupon for $50.00. I'm going to try this until the price of factory GPS systems come way down. Oh and yes I measured the space in the dash and researched the dimensions of the GPS systems before I bought it. Also customer reviews of the GPS systems as far as functionality. Thanks, Dan.