Embarassing Exhaust

I have a 2000 Civic SiR (Canada) DOHC, with an AEM cai, DC Sports 4-1 SS header, Ractive performance cat, and a GReddy Evo exhaust. Now, I understand why my exhaust stinks a bit more, what with the performance cat and all, but should I be getting smoke out the pipe too?

It seems that whenever I go down this hill in my town in 4th, using the engine backpressure to keep down the speed, I always get smoke out the pipe when I put my foot on the gas. Suggestions?

It's not just limited to that circumstance..I also get a cloud at times just sitting at the light giving the engine a couple af revs. As I live in the Yukon with not too many performance shops around, any help from you guys would be greatly appreciated!

This embarrassing situation must end!