Compare - up to 3 tires
Michelin - Pilot® Sport PS2™

• 255/35ZR19/XL (96Y)
• Item #: 808304
• Limited 6 year manufacturer's warranty
• Chosen by the World's Fastest
• Best-In-Class Cornering
• Highest Combined Wet and Dry Performance
• // Click here for more details

Price per tire: $400.99

Price includes:
Shipping & Handling, Mounting, Balancing, Lifetime Services, Nitrogen Inflation, New Rubber Valve Stem, Environmental Tire Disposal, and the Costco Road Hazard Warranty.
I guess Costco just fixed thier mistake.