+1As stated above, your car has CAI, and while in can be "improved", those improvements will just add more noise, not more power.
Messing with the size / shape of the ducting near the MAF can lead to problems, as the MAF may not correctly read air flow after the mods.
So yes you do have a cold air intake that draws cold air from the fender.Uhh, I dont know about that...It has ducting from the drivers side fender well into the stock air box and then through a paper filter and squeezed down into a 2" tube where the MAF takes up about half of the inner diameter and then goes to a ribbed rubber hose to a teeny throttle body...It might get cooler air at the ducting but once it hits that humongo stock air box I bet its not so cool anymore. I actually just experimented a little bit with it last night and needless to say...there IS room for improvement.
What you are forgetting is that even if it does suck, it still flows more the the Vulcan does. The engine itself is the weak link, mods to the intake only work if they increase flow through the engine, which just isn't gonna happen unless you port the heads and possabley go with a better cam or larger valves or something. The stock intake flows over double what the engine does.What everyone is forgetting here is that in the gen 4.5s 04+ the intake setup sucks! The maf is 2" and is part of the top of the airbox so its very difficult to do anything, i just cut the bottom of my stock airbox off but thats no gain in power, if you swap a duratec tb, AND the intake pipe, and get a 3" spectre maf adapter off ebay ($36 bucks comes with a rectangle adapter that WILL WORK) you could make a CAI will somw gains.
Only problem is that im pretty sure swapping the maf pipe will lead to idle issues so you will need a tune, i just did this style intake on my girls 2.2 cobalt with that maf pipe and it workes great so igotta order another one of those spectre maf adapaters again and ill try it out because i can have a tune written for it.
but honestly im not in a super rush beause i know the gains wont be that great anyway. only difference is the gen 4.5 maf is a bottle neck of sorts. going from 2" to 3" in the intake would be good for flow, problem is there is 3 vaccum lines i believe... ill make something custom next week and do a write up on it if i get anything worth talking about.
Amen.What you are forgetting is that even if it does suck, it still flows more the the Vulcan does. The engine itself is the weak link, mods to the intake only work if they increase flow through the engine, which just isn't gonna happen unless you port the heads and possabley go with a better cam or larger valves or something. The stock intake flows over double what the engine does.
My opinion of the Vulcan, is that without serious modifications to the head, it just doesn't produce any real power. You can mod the intake and exhaust all you want, you will get very minimal gains at best.