If i remember it did include a pigy back computer, but i also think they aren't making this anymore so that option is out and it wasnt a ver good one as has been pointed out. If you want to go turbo you would either have to have a shit load of money to through at it or be quiet good around a car and do it all yourself and still have at least about 5 to 6k minimum to do it seriouslyForged pistons are BETTER when boosting (and I do mean turbo), because the extra strength helps for high boost, you need stronger parts. But I'm actually not doing any internals this year, other than the head work. You can boost any Honda engine basically from stock, and only run a few pounds(6 to be safe, maybe up to 8 psi).
The stronger springs will help (boost or not) to achieve higher RPM. Again, you don't necessarily 'need' the stronger valve springs, unless you're planning on revving high. The 2.7 has great torque at lower RPM, and high revving doesn't really suit for natural aspiration (non-turbo). The only reason I'm doing springs, is because the turbo is going to help with the torque-loss at higher engine speed, so I may tune it do an extra 500-800 RPM, but I won't do this until I have it on a dyno, so I can see if the higher rev helps me any.
The valve guides I am having done because, in my experience, I have seen the Legend engines "waller out" (southern terminology) the guides, which eventually leads to guide seal leakage, which contributes to the smoking-at-idle problem that these Legends tend to do.
Like Muffo said, it's expensive. I'm doing most of it myself, and I'm already over $5K in parts. Of course, this is between the turbo components, engine management, stainless exhaust sections, water-air intercooler system, E-V-E-R-Y-T-H-I-N-G. Also, I didn't opt to get a cheap turbo. I got a Garrett GT30 series, which is pricy. There is a place online, forcedairtech.com I think, that sells a kit, but you have to bring them the car, have them install it. $4500 last time I looked, but it's a small turbo, inefficient system (from what I can tell), and doesn't include engine management system, or even bigger fuel injectors. The guy who got one didn't get much of a HP gain with it either.
I disagree with this part. If it's tuned correctly it can make more power by revving higher ie; any Honda Type R lol, F1 racecars, etc. Honda takes small engines that only make so much torque and make them work very hard to spin at high rpms which results in sizable hp numbers. This makes sense because hp equals work done over time, if they make them work harder(higher rpm) and harder the engine will make more and more power. But, it would also need more aggressive cams to open the valves up long enough for high rpm speeds to be beneficial for more airflow to the pistons, and the con rods and pistons would also need to be forged to handle more stress of spinning faster. This is one of two ways for an N/A motor to make more power, the other way is larger displacement.The 2.7 has great torque at lower RPM, and high revving doesn't really suit for natural aspiration (non-turbo).