can u make any power with a 87 2.0 si prelude and is there boltons out there- i'm not finding much in way of headers, ignition uprade, catback n such

 

No offense, its a great motor.. Its just that the after market support is very small. Personally I would just save my money and forget about bolt ons. Even if you do find upgrades for it they would probably cost an arm and a leg because they're so rare. Your best bet would just to invest in a H22 swap if you plan on keeping the car for a while.