I have some crazy sounds coming from the SHO. I have a 2013 +pp SHO with 70,000 miles. At idle all seems ok, but at 30 mph I hear birds chirping, a slight whistle sound and a vibration like noise. I checked the belt I can see, it is indeed cracked, oddly length wise and is Shiney as polished steel. I can push the belt down easily with my finger. ZSHO sent me a Rockauto link for tensioner but I found this kit where they throw in the belts for like 10 bucks. The kit is GATES ACK060448K2, it contains the idler pulley n 2 belts.
Gates KB4056892 which circumference is 36.25 inches.
Gates K060448 which circumference is 45.375 inches.
And the Gates idler pulley #38485
Can anyone confirm this is the correct parts needed?