I wanted to check with you guys if I have more room for improvement? Only thing its missing is dual exhaust 
Options: Auto, Red Line edition, RS Package, Tech Package.
Here is Calculator.
Are you including the incentives (conquest) in your selling price discount? If not (and if you qualify) that should go in the incentive part of the calc. 7.5% pre-incentive (without supplier code, etc.) is a pretty solid discount on these.
I don’t think I qualify for any incentives.
See if you can find a person willing to share a Friends&Fam supplier code, but your numbers are pretty good if you can’t otherwise get incentives. The discount is healthy as noted. All in all not bad for a 455hp car.