bog in first gear
 

I have a 2010 mini cooper s with roughly 125000 miles. I have no power when taking off in first gear. the engine bogs briefly when the clutch is let out. I can over come by revving to 3000 rpms and slipping clutch. not good for clutch. only in first gear all other gears respond well. the only real mod to the car is the k & n cold air intake. Any thoughts?