Pfister Shower Valve/Cartridge Identification

[danreardon]

We have a leaky shower head and when I went to replace the cartridge, I found myself puzzled to find the right replacement. The single handle is a Pfister Iyla, but I can't match the cartridge for a replacement. Any help would be appreciated. Thank you.

 

[GReynolds929]

Should be 974-5299

 

[danreardon]

Thanks @GReynolds929, that was exactly it and the replacement stopped the leak perfectly. Thank you again.