piston ?

im looking for speed i have a cr125r and im looking to know which is better for speed i have a wisco in my bike but i want to know which to go for a stay with wisco or get a pro x piston kit never used pro x but heard good stuff about them

[Sparks425Ex]

I have been hearing alot about wiseco that is not good latly. i don't knwo how much of it is true but i have heard it from quite a bit of ppl. I would go with the Pro-X because they are great Pistons. I have heard a bunch of good stuff about them.