When i replaced mine it was a HUGE PAIN! Nothing went right! I had to end up cutting the EGR tube since the collet nut was frozen to the manifold. Luckly my brother was able to weld the tube back in one piece apparently the dealership wanted over a $100 for a new tube! Once I got to the gasket to my shock it was cracked and leaking into all the left bank cylinders! Remember to torque the manifold back down to 13ft. lbs. not the suggested 18 ft lbs that the manual specs unless you want to do the job again. I know i sure dont!