I just finished my b18b1 swap in my 94 coupe. Everything went fairly smooth.. I used Avid motor mount kit and the motor sits VERY high and almost cannot clear the hood. I used a DC Sports 4-1 header and it DID NOT bolt to my cat. It was 3" away and teh flange was flipped 180 degrees. The car is currently at the exhaust shop so they can extend the cat and flip the flange 180 deg. Another thing that wasnt bolt in was the B series throttle cable. Everything was fine under the hood but where it connects to the pedal was completely different than my stock DX cable setup. I had to hack it until I can get to the junk yard to get an integra gas pedal assembly. I also used my DX slave cyclinder so I didnt have to bleed anything. I also found that its easier to use the LS top radiator hose and Del sol DOHC vtec lower hose. Everything thing else went smoothly. No CEL's. Car runs and drives, no known issues except the major exhaust problem. I talked with someone else about it today and they said If I used the b16 header it woulda fit cause it is longer... who knows. What do you guys think about that flange. Its definately not something I screwed up, the flange is facing the opposite way and is welded on both the cat and downpipe so i cannot turn it, the cat and catback are OEM original not tampered with.