hey...i'm new here

so i have a 4dr 2001 accord 4cylinder, i already have an intake, exhaust, and headers. but the headers is not installed yet, i have to put an o2 on it. so i am looking into a performance chip for my honda (finally), i'v googled it but came up with some stuff but im not sure what im looking at because a bunch of other things came up too.

i know, well think i know that chips goes onto the computer right? but theres other products comming up that connects to the IAT sensor, i dont even know where the IAT sensor is on the 01 accord

can someone help me please.

may wanna check 4 a Hondata system, but not sure if it comes 4 our cars....or an Apexi... looks very good and helps performance