So finally decided to put in an Aftermarket Intake. Went with the K&N aircharger since I saw that most LS4 folks on here and LS1tech forum found it to perform better.
Deffenetly made my stock exaust louder. I feel a little better throtle response. But I think it was worth it just for the sound.
Around 2500-3000rpm car is so much loder I can hear and feel it iside with the windows closed. I could hear before but not as much.
Even my wife noticed it when she went to the store with my car. She tought she" broke it or something" ( she likes to step on it when she drives it) lol I don't blame her.
It is the funniest thing when I let her drive me around every dude is trying to race her .
Anyways back on topic.
So I can't tell if there is any difference as far as milege goes. I need to reset my Avg. to see how that goes.
For the guy that wants an easy and relativley cheap do it yourself upgrade. took about an hour.
Got it from Amazon $200 Shipped.
K&N I recomend.

 

Not sure how many options you had for CAI, but the KN would fit yours the best. Wait till you hear it in the winter.

With the supercharger at idle it makes a really cool sucking sound but you can tell it is free flowing.

 

By the way, nice grill insert!

 

Thanks Jeff,
$30 from ebay, has a very cheap feel, looks great unless you inspect it from very close then you can see someflaws lol

 

Im sure his SS isnt supercharged. Am i right mecho? th 5.3's are N/A

 

Correct. The 04 and 05's had superchargers in the 3800's, the 3.5, 3.9, and 5.3's on the 06+ models are all N/A.

 

I can't find one for my 3.5

 

The K&N will fit the part numbers for the stock v6 and v8 are the same.



The only fitment issue with the K&NFIPK is that the V8 has its overflow bottle on the drivers side as opposed to the passengers side, the kit has a cut out to accomidate this but should be easily corrected.