easy to install, but a word of advice. i would have an entire weekend to get it set up correctly. DO NOT USE THE JET KIT THAT COMES WITH IT!!!! they say ot comes with a complete jet kit and it does not. you do not get a new spring, thr new needle, or clip. you need to order the Dyno Jet kit when you purchase this and have plenty of time to get it set up. my settings are the following.
200 Dyno Jet Main Jet
55 stock honda pilot jet (slow jet)
clip on the 5th from the top on the needle
2.5 turns out on the A/F mix screw