Costco May (MICHELIN) Tire deal with free install after coupon

Hey guys I only saw some expired posts but none on the new month’s deals
MICHELINs are rated hire than bridgestones, premiers are rated at 4.5/5 stars and primacy is rated at 4/5 stars (tirerack)
Because of the premium it is a tad higher
https://www.costco.com/auto-tires.html
Coupon code after adding to cart:
MICHELIN17MAY – $60.00
MICHELIN17MAYC – $60.00
(Seems to work the same and doesnt stack)
Example deal I got:
Order Summary
Subtotal (4 Items) $738.96
Shipping $0.00
Tax $53.90
Promo: MICHELIN17MAYC Remove -$60.00
You have entered a duplicate promotion code "MICHELIN17MAY".
Order Total
$662.86
Total Discount on Order
$130.00
Note:
TIRE DISPOSAL $4.00
TIRE INSTALLATION $56.00
CA STATE TIRE FEE $7.00