While I don't recall hearing about any stock SRT-6/SLK32/C32 pulleys flying apart yet, I hadn't heard of any Stock E55/SL55 pulleys flying apart before my SL55's stock pulley had a near-catastrophic failure (noticed it wobbling with 2 of 3 "dog-bones" cracked/broken and got if off before it flew apart).

It is not my intention to scare anyone into putting something on their car, I just made something I wanted/needed on my car and am making it available to anyone else who wants one as well. I put a bit of thought into the design in an effort to make it both functional and attractive while making it available at a price that I would gladly pay if someone else had made it rather than I.

Should this go on a car with the Stock SC pulley ? At this price I think it is an inexpensive source of "piece of mind". I will certainly put one on my SLK32 (with Karmen pulley) AND my son's SLK32 (with stock SC pulley).

Cheers,
Chris