okay, I just notice the follwing happen, I hope someone can shed some light on the situation.

My brother is on town, he says let's go for ride. I start the car (sitting for the night) no problems, no smoke nothing, all is normal. I put around for a bit to get teh car warm. I get to like 85C wataer temp, on the highway, then do a 4th gear run up to about 7k rpm, when I let of the gas, and as I am just decelartiing from 7k, I see good amounts of smoke coming out of the back. I am thinking, what the hell is that, it may have ben there before and I just didn't notice it. Anyway, I shifterd gears, and kept going. I tried it again, and nothing, no smoke. I could not reproduce it.

I have as full exhaust, intake, IC, PFC (base maps). I park the car for a bit later on, get back in, and see nothing. park for 3 hours start it, anmd see some smoke on startup for just a few secs. never did that before, haven't had midpipe long though, maybe from that?

Anyway, just wondering if anybody has any ideas, I haev never lost coolant, in fact I have't added any in about 8 months since I flushed it out. I add maybe half a quart of oil every 2000 miles. however, if problem just started then it hasn't happened enough to show itself in loss of fluids.

Any ideas?