My LR4 put down 240-ish HP with just a few bolt ons (CAI, Efans, muffler, etc.) With the 212/218 it put down 272/262. I cant remember what cam you have (if any) but I would be willing to bet that you are at least in the 245-255 range with the MPH that you're pulling.

 

I dynoed two weeks ago and I hit 252rwhp! I have a 2003 4.8 3.42's FIPK2,Flows,93 Nelson Tune 0 TM,Transgo+vette,cooler as stated below. I cant remember my torque I think it was 253 or something. Its been a long 2 weeks but Ill go hoem and get my sheet and let you know if Im wrong but the rwhp is right! I guess I was happy with the #'s for the mods Ive done!!!!!Good luck man!