86OrangeRx-7

Okay, I know my car is running rich.. the soot on the bumper is telling me so, but now every morning when I got to start her up and goto work she starts puffing blue smoke... Now its unusual, It only does it after its sat for a while, and it only does it when there is this nice POP sound comming out of my exhaust like someone stuck a firecracker inside there... I had the car in the shop for clogged cats, I replaced them with a bonez high flow system.. courtesy of rx7.com and installed by ito. The puffs of smoke are pretty decent about 10 feet long and last about two seconds.. they occur 2-3 times and then stop. and won't do it again at all. (update) crusing to my second job I pull in and the oil light goes on.. I'm low on oil.. I guess the blue smoke is burning up the oil pretty good... Was down 2 quarts. I only had the oil changed 3 weeks (600 miles) ago

Any help would be appreciated.. Least I know what I have to have done and cost estimates before I go bring her to ito and have the work done.