I've had stainless split locks for 5 years of daily driving and they still look new. I still say "Best header bolts on the planet".

 

As I said I will post pictures of my rusted Stage 8's they look like hell. Unless there is a stainless steel that rusts the stage 8's are not stainless. I sure wish this was not the case I wasted 60 bucks........

 

I use the Stage 8s. They have been on my daily driven car for almost a year now with no rust, got am new for $45 and they are stainless. They are kind of annoying with the "E" clips but they wont come off unless you take em off.

I have used the percys and while I like the idea you need to be carefull who works on your car, I have heard horror stories of guys not knowing that the have to loosen the center bolt and rip the threads out the the heads...especially on aluminum.