What is the best Intake and what type (Short ram, Cold air) is the best for a '05 g35 5at ??

Did you try to search? There is alot that covers this topic.

I like my Injen CAI

search it..............so many threads on this...........dont get jnkirk started on this one

i cant find anything in an AEM search...anyone have an opinion on this intake compared to Injen?

Aem is a so-so intake and Injen is supposed to be 10x better in terms of gains.. IF you are looking for sound and do not want an extended piping system...i would recommend the JWT popcharger i have one and loveeeee the sound 4K +RPMs . Where are you jnkirk? back me up!

does it matter if you have an AT or Manual when picking out a CAI? EX: Does Injen make a CAI for an AT and a Manual or does the same one work for both?

z-tube+k&n+modified stock air box for teh win

is it hard to modify the stock airbox? can you tell me how?

remove power duct(#5)
remove water-catch can resonator(#8)

Injen CAI provides practically no improvement. Stillen high-flow airbox seems to be a favorite on this forum. Same goes for JWT pop-charger - a lot of folks have it (i used to). then, there is the Z-tube - intake tube from 350Z - increases diameter of the intake and scraps the resonator.

i personally have 3.5" Weapon-R Secret Weapon intake - and i absolutely love it. it looks awesome, and provides improvement over such venerable combinations as JWT pop-charger + Z-tube.

I have the K&N Typhoon. I love it.

What does modifying only the stock air box according to 99atlantic do to our g? I have an 06' AT.

i second the love...good looking out g35sedamn for the hook up!

HKS racing suction, bit pricy but, the best in my opinion.

JWT popcharger and ztube, Highly recommended!!
Sounds AWESOME!! Reasonable Price..