I have a 03 redfire 75,000 miles All that had ever been done to it was drop in k/n and two high flow cats with x pipe ford racing mufflers.When it was new it dyno at 378 RWHPall stock.The orignal owner then put the x with 2 high flow cats and ford racing mufflers.It even had the air silencer in it.It dynoed at 398 RWHP.I am going to put a full JLT cold air kit and a 2.8 pulley and I have a diablo programer with the pulley tune.What kind of HP can I exspect.Thanks.