Have you tried Pro-Bolt?
GSXR1300 HAYABUSA '08+ - Suzuki - Motorcycle
All I have ever used from them was Ti or SS and the quality has always been top notch. No problems here.I've got some Pro-bolt stuff on my bike. Aluminum Allen Head black engine bolts still seem to be ok.
I also got black adjuster plates for the chain but this is what happened to their sprocket nuts >>>> https://www.hayabusa.org/forum/gene...d-always-give-your-bike-close-inspection.html <<<< >>>> https://www.hayabusa.org/forum/general-bike-related-topics/131486-kml-im-you-pro-bolt-sucks.html<<<<
If they still make them same way two piece stay away from them.