Cost for Michelin AS3 Tires for a C6 Grand Sport
 

315MHZ TIRE PRESSURE SENSOR 4In Stock$42.00 = $168.00

275/35ZR-18 MICHELIN PILOT SPORT A/S 3+ ZP (W- OR Y-SPEED RAT RUN FLAT, 5-RIB TREAD DESIGN SL 2In Stock $288.91 = $577.82
Includes Free Road Hazard Protection ($55.96 value. Two-year coverage.)$0.00

325/30ZR-19 MICHELIN PILOT SPORT A/S 3+ ZP (W- OR Y-SPEED RAT RUN FLAT, 6-RIB TREAD DESIGN SL 2In Stock $345.31 = $690.62
Includes Free Road Hazard Protection ($66.88 value. Two-year coverage.)$0.00

ORDER PICK-UP DISCOUNT 1In Stock-$52.00-$52.00

I did see a little cheaper for rear the tires on another site but being that I can pick it up on my way to NJ I can save tax and ship fees.

Order Total: $1,392.44
There is also a 70.00 mail in rebate.