I have a 2004 2500HD 4x4 truck. It already has gibson headers, true dual exhaust (3inch), spin tech 3inch mufflers (I know, but the price was right), K&N cold air set up, and I have a hypertec programmer III on the way. Any other goodies to help with power and or mileage?? Is a cam swap or intake upgrade available and or worth it? I would love to slap a blower on it, but I haven't had the welth re-distributed to me yet.
Thanks for any thoughts in advance!!