It has been stated on this forum that the 7.5 can only handle 300 lb/ft of torque, considering the V6 starts off with 240 that doesn't leave a lot of room. CAI, headers, duals and underdrive pully would probably get the engine pretty close to that 300 mark. Supercharging with no other mods would get it there and maybe over. Is there anything that can be done to strengthen the axle enough to handle up to 350 lb/ft of torque, short of swapping it out for the 8.8? What about the T5 transmission? How much torque can it handle? If it can only handle 300 like the axle then is getting a stronger after market transmission to replace the T5 the only option? If the transmission and rear axle have to be replaced if the engine is pushed over 300 lb/ft of torque then it seems to me that it would be better to just trade up to the GT if you want over 300. Otherwise it's just too much work and expense. One last question. how does increasing the gear ratio effect the axle strength wise. That is if you mod the engine to where it's putting out around 280 or 290 lb/feet of torque, about 250-260 hp, would changing the axle to 3.73 gear ratio be too much for it? If keeping it under 300 for torque and just bumping the gears will not destroy the transmission or rear end then I plan on getting my engine as close to 300 lb/ft of torque as I can. I don't need to be running with the big boys, Corvettes and Cobras. I just want to have respectable performance without killing my car. Though it would be nice to get my car at least into the upper 13's in the 1/4. Don't know if that can be done with the T5 & 7.5. Any info on the drive train limits would be much appreciated. It'll give me an idea where to go with the engine.