Info on 6.0, 2500 HD, 2004 silverado

[RFIRE4]

I'm buying a relatives 2004 silverado 2500HD truck. It has the 6.0 engine. I have driven it on couple trips and have really enjoyed it. I would like to do a couple of upgrades. Intake and exhaust are what I'm looking at. Starting with the intake, whats out there that is good and is worthwhile. Second the exhaust, what products are recommended, is there a noticable gain, redo the whole system or catback or just new mufflers? Would like a little rumble at idle, but very little cabin noise on highway. I'm also looking for any other info on this type of truck.

 

Thank you in advance for your replies,

 

RFIRE4

[02denali]

i have had a ton of intakes. custom-UPD (NSV)-airraid,and even a k&n is what i started out with. even after going through all those intakes i went all the way back to a k&n. i firmly believe that it is one of if not the top CAI. as for exhaust. i went to a magnaflow muffler. 12569 i beleive. it is designed for the hd exhaust. it has a true x pipe design inside of it to work well. it has a great deep tone and it is quiet while cruising on trips on the freeway.