Hi there !
I am very interested in your project, as as I just had a look on TireRack, I have some comments to do before.
First of all, the functionality, like search, filters, attributes will be assured as you asked before. But for website structure, elements, modules, and other stuff that make clients easy to browse and buy, you will need something more than TireRack, which is kind of old fashioned. I can guide you and give you some tips so we achieve a much better store than the referred one.
We can start with many platforms, like Magento, Opencart, Prestashop, but my suggestion is to go for Opencart, as it is easy to maintain by people without web knowledge and it is highly customizable and reliable.
I will also assure you search optimization for all pages so your website can get indexed on Google immediately.
I am available to work over 10 hours a day so the turnaround time will be very good.
Please come for a chat so we can discuss further about your project. I'd be happy to assist you.
Kind regards,
Adrian