Intake
#2
Every intake has its own advantages and disadvanatges. I would say most people on this site are running either the K&N FIPK or the AEM Brute Force. Both of those intakes have exposed filters and I've never really heard any complaints about them.
#4
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#8
Originally Posted by WildWilly
What is the best intake for a stock 5.3? Is a inclosed box better than an exposed filter? 
#9
Honestly, it seems like they're all pretty good, except for the Vararam...that's the only one that I've heard negative feedback on. I've had both the K&N FIPK and now the Volant w/ ram air on this truck, and they both seem to perform the same. One thing to consider is if you're ever going to go from the stock 27" radiator to the HD 34" radiator (necessary for 05 efans). The Volant clears the 34" rad, while the K&N requires modification. I like the Volant better though, as so far, the filter doesn't seem to get as dirty as quickly as the K&N did. I'd recommend Volant since that's what I have and I'm happy with it, but no matter which one you choose, you'll probably see about the same gains, which are slight, especially on a stock engine.
Considerations that come to mind:
K&N
Volant
AEM
Outlaw
TrueFlow
AirRaid
Home made (do a search and you'll find a wealth of info on homebrew CAI's that look and perform great)
E-bay heat shield and filter with homemade intake tube
I'm sure there's even more than that...hope this doesn't confuse you more, just trying to widen your options for ya and input my .02
Considerations that come to mind:
K&N
Volant
AEM
Outlaw
TrueFlow
AirRaid
Home made (do a search and you'll find a wealth of info on homebrew CAI's that look and perform great)
E-bay heat shield and filter with homemade intake tube
I'm sure there's even more than that...hope this doesn't confuse you more, just trying to widen your options for ya and input my .02



