what are some turbo set ups for our cars, witch ones are better than others, is the horse power freaks turbo kit any good, and how do the horsepower freaks compare to the sound preformance bolt on turbo kits, what would be a good size for a stock 7mgte, i want fast spool but good top end and 500+ possible horse, im looking for a turbo kit and was all for the horsepoer freaks 61 mm but the price is well alot so im also looking at the sp turbos i also want to know what else is out there, what would work best with a stock supra and be able to grow enough to make some power?