Sacred fist progression?

[Masakan]

It's never stated but does going into sacred fist give you more stunning fist attempts or is there something im missing?

[Psyren]

No, the PrC only stacks with unarmed damage. It also gives an AC bonus that stacks with yours. Nothing else is advanced, including Stunning Fist attempts (though you still get the +1/4 levels base progression), stunning fist DC, fast movement (the PrC provides one that doesn't stack with yours but can overlap it), flurry etc.