Okay so I have an A4 01 SS which I broke the rear end diff in after just headers exhaust an intake and dyno tune. I now have a moser engineering 12 bolt with 4.10's. I am going to install ported 241's on the car and am considering a cam and a small shot of nitrous. My tanny already slips some, should I chill out? How much hp can the stock auto handle safely?