I too am building an H23a4 swap for my civic. I am buying a t3/t4 turbo kit in the next month. But what I don't get is all you guys have such low horsepower and torque specs you are shooting for. Correct me if I am wrong but the H23a4 is pushin 160/156 hp/torque so if you put a turbo on that and a turbo back exhaust you should be pushing already in the neighborhood of 215/200 (ish) but on my swap I am not sticking with anything stock. The intake manny, throttle body, pistons, rods, fuel rail, and injectors will all be done. I plan on going an all venom high flow fuel rail and injectors, aem or venom intake manifold, forged H-beam rods (if I can find them), as well as forged pistons (if I can find them). I also plan on port and pollishing the head doing a 3 or 5 angle valve job, and aftermarket cam gears. I then plan on going the full 9 yards on the tranny and clutch as well with a racing clutch, lightweight flywheel, and a rebuilt h-series tranny. Just in your guys opinion how much power will I be putting out? I plan on boosting it around 10 or 15 pounds but I will have an in dash Hallman boost controller to turn it up whenever. I am shooting for at least 400/350 (ish) but I guess after I have it done and dynoed we will see.