So my friend told me that A.E.M CAI are the best ones out there for honda's but another person told me that K&N CAI are better because they are not metal its more plastic so you can get a better air flow, but with A.E.M since its metal the air just bounces around, any ideas?

 

No matter the intake, you wont see that big of a difference in HP.

AEM, Injen, Fujita...they are all basically a tube with a filter on the end of it.

Combined with a header/exhaust combo you will see no more than 10-15hp increase.

Good Luck

 

Metal conducts heat/cold much better than plastic, so a metal CAI would probably yield a slight gain over a plastic one.

I believe the K&N has veins that run the length of it, which for some reason is better for airflow.

 

Most people have stated that you need a header exhaust intake combo to full take advantage of the intakes for these cars.

 

thanks!

 

True! But only a slight gain.

 

so it really would'nt matter on which one I should get? cause it really doesnt get a gain from it?

 

I'd say...

Warm climate = Metal CAI

Cooler Climate = Plastic CAI

 

thanks!

 

Are you kidding me? Most have hit the 215-225whp range with I/H/E. Considering most stock Si pull between 170-180whp it's closer to a 35-55whp gain. In a car that is under 3,000lbs, it makes a huge difference.

The veins work to help guide the air. No real effect on the long straight sections of pipe but massively helpful in the bends. Cuts down on turbulence around the bends thus helping the air get to it's destination quickly.

 

Proof? If you can show me one 06-09 Si with I/H/E making 225whp untuned then you will have clearly won this debate. I personally have never seen so much gain...atleast not without a proper tune.

 

I'm not so sure about a 35whp gain. That is a little high for a NA Honda engine, already operating near its peak potential.

 

Being that no one has show proof in opposition of my statement then I see no need to go on some scavenger hunt for info when you didn't.


The absolute worst I have seen is 200.7x whp after a I/H/E swap. Some have taken it a step farther with cams and hit 240+. I'll agree that the first few to do I/H/E didn't see much past 210whp, but it seems the latest have seen, on average, 215-225 when using quality parts. You can't really expect to get there with the bottom of the barrel now can you?

 

In my R18 I have seen a .5 increase in 1/4 times with I/E. I don't know what HP it has done but it will give you that little edge over complete stock. Not enough to know the difference just driving around town.

 

With or without a tune? I gained just over 20whp with I/RH....but I don't have the exhaust yet. And I don't see how the exhaust makes a 15hp difference by itself.

I seriously doubt a full combo would produce a 55whp gain...even with the most expensive and efficient RH out there...whichever it may be. Not even close. I could MAYBE see 30whp....but 55?? Cmon man.

If I'm wrong....by all means...show me otherwise. If 55whp is possible I'd certainly like to know how it's done.

 

I/H/E would gain you from 200 - 205 without a tune.