I just installed a CAI in my Civic two days ago. Everything is still fresh in my mind. Didn't read any instructions and it's simple. Jack your car, take off the front right tire, move the splashguard, rip out the resonator and factory airbox setup (don't actually rip it out, unbolt and stuff), I got the resonator out without removing the bumper, then rebolt the new air intake on. Star up the car and hit the gas and listen, or get a friend to hit the gas and listen to everything. Take the car for a test drive and see if anything rattles or there are any weird noises. If so tighten stuff up. That's it.