I/H/E is definately worth it. But if you just blindly buy brand name crap, you'll spend too much and probably wont get a great setup.

The intake isn't a big deal and you can just go generic of DIY for that. I went with a 3-inch diameter generic short ram, it has one bend (mandrel, of course), and a silicon reducer to connect it to the throttle body. I have a theory as to why it works well for me, but I wont get into that right now, and like I alread said, it's not a big deal.

For the header, I have a DC 4-2-1 2-piece. I did my homework on the 4-2-1 vs 4-1 decision. But, admittedly, I chose a DC brand because it wasn't too expensive and a lot of people seem to think they're great.

My exhaust is a Type-R cat-back. I chose it because it's bigger diameter than stock, but not too big, and it flows well (mandrel bends and a good muffler design). The idiots will argue with me all day about my exhaust vs aftermarket, but let's face it... Honda knows what the fvck they're doing better than some aftermarket company, so I'll gladly take something that they consider a performance exhaust for an Integra. I also saved a lot of money by getting this exhaust.

And my setup has been proven twice on a dyno now. No, it's not for everyone, but it's great if you want upper-mid range power (what LS cams seem to be good for) and you're not going to do many power adders other than I/H/E.