Replace stock intake tube
#12
I understand more restriction being in the air filter. Most intake kits don't just change the filter with hi flow filter, they also change the intake tube. Maybe, its because they found out that it is beneficial, otherwise why do it? Maybe the gains would be very similar with just the smooth tube.
#13
#14
Just like to state that manufacturers have nothing to gain by designing and building something stupid. A fish has scales and that makes for a rough texture. After a couple of hundred million years they still haven't changed that design....I guess they don't swim very well If it ain't broke why throw money at it to fix it?
Adding the ribs to the tube will create a bit of air deflection internal to the tube in which case acts as a bit of an air box muffler. This cuts down on the intake noise and drive by noise. Granted it likely does not make much of a difference but every little bit helps. If you look at the 2012 intake tube you will notice a bunch of chambers hanging off the side of the tube. This is to reduce that sound even more.
So in short yea it will make a difference, will it be noticeable probably not maybe 1 or 2 hp if I had to guess. So that tube coupled with a high flow filter such as a K&N you may stand a chance to pick up 5hp or so.
As everyone else is mentioning the throttle body is going to be the most restrictive portion of the intake especially since we do not see wide open throttle often.
Another thing to keep in mind is that if you allow the engine to breath more air you will also want to allow the exhaust to flow better.
#16
Don't worry, I don't plan on throwing money into this and your check for 2 cents is in the mail. It just crossed my mind while reading other posts regarding CAI systems. I am not looking for more hp.
#17