I’d be taking a close look at the tensioner… only way that pulley gets to be that way is there’s not enough bite into the belt and too much reliance on the frictional pulley surface. I could totally be wrong, but just my 2 cents. 
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2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, ATI 8L90, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors & BB HPFP, TooHighPSI/Katech port injection, 15” conversion 1066 WHP STD/1027 SAE, 9.10@152.5 (new times coming)
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