The car and the track are available for DL in the links below, excellent modelling for both. The game runs at 25 FPS almost maxed out on my system.

Track: http://www.racedepartment.com/downloads/road-america-2-5-2.5274/
Car: http://www.racedepartment.com/downloads/corvette-c6r-2013.2852/

Donations are always welcome.

Current System:

Intel® Core™ i5-750 (8M Cache, 4 x 2.66 GHz, 3.2 GHz with Turbo)
Intel® DP55WB
Kingston® 10 GB (1 x KVR1333D3N9/2G + 2 x KVR1333D3N9/4G)
MSI® AMD® Radeon™ HD6770 (MD1GD5)
Seagate® Barracuda™ 7200 rpm 500 GB
Intel® 2.1 Channel
HP® LA2205wg
A4Tech® N-500F
Dell® RT7D60
Cooler Master® Extreme 460
APC 1.5 KVA UPS (as backup power)