5.9 performance?
Gas or diesel 5.9? 
For gas, I had an '01 5.9. Put a tuner on it. Superchips or B&G flash. Then the next biggest gaining mod I did were Crower 1.7 roller rockers. GREAT power increase. Then after an APS 52mm TB, airraid intake, PPH headers, u/d pulley, flowmaster muffler, and shaving 1 3/4" off my intake runners, I hit 245rwhp and 380rwtq.

For gas, I had an '01 5.9. Put a tuner on it. Superchips or B&G flash. Then the next biggest gaining mod I did were Crower 1.7 roller rockers. GREAT power increase. Then after an APS 52mm TB, airraid intake, PPH headers, u/d pulley, flowmaster muffler, and shaving 1 3/4" off my intake runners, I hit 245rwhp and 380rwtq.




