i got a air intake and i was wondering if i leave theintake hat on will i lose an horsepower i may gain from taking it off

 

Well... don't know about the 4.7 hat but if it is like the 5.7 hat ...LOSE it!! your engine will like it! But get some imput from the 4.7 guys cause I really have no experience with them...

TJ

 

On the Hemi engine, some say that replacing the Hemi Hat with a straight tube is worth 6-8 hp. I've had an Airaid MIT and have swapped it back and forth with the Hemi Hat. I really couldn't "feel" any difference but I don't think you would feel 6-8 hp. The stock systems from Dodge are pretty good! There was an article on DTW's main page where they installed an AEM Brute Force intake and a complete Flowmaster cat-back exhaust using a 50 series muffler. The intake was good for 6-7 hp and the exhaust was only good for 2-3 hp. Even the article said the stock stuff is pretty good. I know 10 hp is 10 hp more than you had, just don't expect big gains from any intake or exhaust system.
Jim

 

IMO stay away from the flowmasters. I had one on mine for less than 500 miles. Hated the sound and it didn't do anything for the trucks performance.

I used the stock intake, then a 360 Air Intakez Power Shot and finally a AFE Cold Air up until I lost them all with the new build. IMO the AFE out performed the others. The hemi hat is good, but in inspecting mine it could use some "smoothing" inside for a better uninterrupted flow. The 360 intake added noticeable power over the stock intake but the AFE, I guess drawing air from further away from the motor, along with the ease of making it a track intake from the location, makes for the best power out of those 3 IMO. I cannot say about others nor can I give you actual dyno numbers.