The max index score on the WISC-V is 155, and the max FSIQ is 160. So no, there are no current tests with composite scores beyond 160. Those scores can only be obtained by using very outdated tests (e.g., SBLM), or by using extended norms on moderately outdated tests (SB5 or WISC-IV). 175 (+5 SD) is well above the ceiling of the reputable tests.

...pronounced like the long vowel and first letter of the alphabet...