So looking at Gates recommendations about shelf life of a timing belt they say this? "Timing Belt when properly stored is good as new up to 8 years. Life expectancy is reduced 10% per year for every year thereafter." With that said I'm concerned how old the stock of NSX timing belts out there really is. Anything mfg after 2014 is on the downhill slide. I've got two Gates belts in reserve with date codes 111 and 708. Based on when I purchased them I assume they're from Nov 2011 and Aug 2017. So the one is passed 70% life and the other is technically OK till 2025. Does anyone at Acura/Honda even dispose of stock that has timed out? Based on how the mft date code is made I think Gates intends belts to be retired after 10 years from the mfg date. Anybody have better insights on this?