You would be better off with the full front mount mate with fans. Double capacity ones are just suitable for standard upgrades for lower spec engines, not your stage 3!

Go for the front mount and buy the fans, or for the 230, you mayaswell buy a new one from autospecialists.... £50 more, but with guartantees and that.

I'm running an airtec front mount on mine. Although pretty heavy, it's a great cooler.