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I just bought an 05 EX. It already has a K N intake and an exhaust. Not one of those fart cans but an actual exhause. Im lookin to put a tornado on it and have it on order. The only one they could find is for a 2000 EX, will it still fit my 05???? What else can i get to help with gas mileage and add a lil HP without goin so far as to get a turbo????

 
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Please, for the love of God, don't put that thing on your car. It's going to do absolutely nothing. I promise you, look at all the work that was put into designing the flow and fluid dynamics of your current airbox. It's designed for one thing, and one thing only. Efficiency. Honda spent untold amounts of money paying some of the best Aero engineers to design the most efficient intake design for this engine's flow numbers. Do you really think some guy could make a $20 universal part that will give gains across the board on all cars with an internal combustion engine? And no, the 2000 EX uses a D17Y8 (iirc) and that has a different airbox. Maybe if you compare the outer diameters you could find out for sure. but if I had to guess, I'd say no. Different generations of cars and different engines.

And just for the record, we were discussing filters the other day. K&N may have a higher flow capacity, but if you look at the fine print, they only filter at 92%, if I remember correctly. OEM (or OEM replacement, i.e. Fram, Wix, etc.) filter at 98% or better. Just some food for thought. It may or may not be a big deal, but just know your engine's not as clean as it should be. If anything, I'd change my oil a little more frequently than the standard service interval, maybe every 3K miles. But that's based on speculation and an educated guess, not hard-core numbers. Just my advice.

An older member had a setup similar to yours (Cold-air intake, high-flow header, and cat-back exhaust) and dyno'd it, just as kind of a "what the hell" proposition. End result was 3~4 hp gain, and actually a 2~3 lb.ft. loss. After several hundred dollars spent, the gains were negligible at best.

I'm going to assuming you're fairly new to the whole modifying thing, so excuse me if I'm saying something you already know. But the motor in your car (A D17A2, specifically. Single overhead cam, 4 valves/cyl, 1.7L displacement, 9.9:1 compression) is designed for one thing, and one thing only: efficiency. It does that job very, very well, but once you ask more of it, it's going to fall short. It's not a sporty engine by any stretch of the imagination. If you want to get more power out of the engine, you're going to need some work, and, I'm sorry to say, money. Rebuilding, boosting, or swapping in a whole new engine are really the only options. Some will say Nitrous Oxide injection will help, but 9 times out of 10, you'll blow up your motor. It's like a hot chick with an STD. You wanna hit it, but you're afraid of the consequences, for good reason. It can only end in tears.

So to make a very long answer short: Nothing. I'm sorry.



But it's nice to see someone else my age on these boards. Welcome to the site. There's a lot of very, very useful and knowledgeable people on here, and you can learn quite a bit if you read a lot and ask the right questions.