06 m7 loading up.

I have a 06 m7 with a slp can and a rkt clutch kit red/white cat spring on the middle hole everything else is stock. The problem is when im runing at a 1/4 to 1/2 throttle and pin it the damn thing sputers and pukes for a few seconds and then runs fine. If i let it idle for any length of time it does the same thing.The oiler was turned down last year and i have had the can on it for 700/800 miles with no problems. Idont no if its the clutch kit or somthing else if anybody has an idea please help. Thanks

The thing i dont understand is that last year it ran great i had no loading problem what so ever until i used the rkt cluth kit. Maybe ill try the stock can and see what happens. Thanks for the info.