Originally Posted by twinskrewd

You better worry about them at that power level. Clutches will fry during shifts thanks to the torque and you will plow through the stock torque converter as well. (A stock torque converter has to lock up around 65-68mph to keep from burning it up with 400rwhp.) You will also be in rear axle twisting territory not to mention the drive shaft which twist up around 450rwtq. You don't have to do burn outs or 1/4 mile runs just pushing the gas to the floor will do it. I can do burnouts from 30mph with my mods. I can't imagine having an extra 100hp/100tq at the wheels. The engine will need better valves (stock ones melt at 1515F), valve springs, and ported heads to be efficent. Better radiator for cooling, 3" true dual exhaust, fuel system, 60lb injectors, SCT BA 5000 MAF sensor.

Originally Posted by twinskrewd

Right but isn't your truck a single piece shaft? It's the two piece shafts that break.

Originally Posted by FATHERFORD

Depends on the truck....

Back when I was driving/street racing my truck I never had any problems with the stock driveshaft/rear end with sticky tires.

I was also making 450hp/tq to the ground on 12psi with stock exhaust manifolds. According to the gods my engine should have melted away, yet I ran that way for years.

Originally Posted by javier garcia

Is anyone here using an aftermarket driveshaft? What kind? And what's ur opinion on it.