Hey man sorry for the late response, I've been running full bolt ons, except headers on my 4.7L with no problems. CAI aggressive tune from Sean Powell at Hemifever, custom y pipe from the manifolds back, underdrive pulley, Tstat, plugs (nitrous), TC from edge racing. 4.10's motive and LSD auburn. And this motor has held up good I've had no problems other than changing the water pump because of the belt being to tight (before nitrous). I've been running my nitrous kit on a 125 shot now for about 2 1/2 years now and the motor is doing just fine, I have 79k miles right now trans is also doing well but I did add a deep finned pan to help the cooling.