topline pistions

I'm planning to run high boost and hihg rpm's ( 8500) will topline pistons handle these conditions?

8500 rpms?...
Um I think toplines are more of just a factory replacement. If you have high performance in mind, get a performance brand, (ross, JE, wiseco).

If you can shell out for the forged go for it, otherwise I think Mitsu OEM's are the same price as Toplines, check SBR to make sure. I think you should be fine, but just know that you're going to have to have a pretty decent tranny to handle high RPM shifts like that and a pretty decent cam/head setup to make use of those revs.