If you don't have any knowledge or good fab skills its easier to buy the Voodoo kit from FM or one of the kits from Begi. Both work great on limited boost but neither will make lots of power because the MAF runs out of resolution quickly on the NA's. Once you switch to a MAP based system you can run over 240whp with a good tune on the stock engine. I too have done a few miata's down here and run a 400whp NB all the time.