When i was reading your post i noticed that you want to do 2.75 diameter for the cat back. That is gonna be too big , you will lose what little lowend torque you have. You also can also see what parts they changed in 1999 or 2000. That is when the horse power jumped from 126 to 146. You could probably find those parts on line and used for a decent price. Also alot of parts for the integra work on the crv. So those are a couple of suggestions.