Okay! I've only been doing this for what almost 10 years now, do a search on how many people have problem with pfc compare to other computers. If you are going to do a 20b in the next 2-3 yrs then go with a different computer, just keep in mind that a 20b swap is any where from 25,000-40,000. For 400-550rwhp the pfc is all you need, just because other shop can't tune a certian computer shouldn't be the reason why they want to sell you a different one. IF we can't tune it we will recomend other shops, The hks twinpower has been around for about 10 plus years and has been proven to work very well. My old setup made 620rwhp @ 22lbs with no spark issue, if it was my car i would junk the stock turbos. You are not going to gain anything running a bridge on stock turbo's. Ask a couple of local guy's like scott or tony to give you a ride in they're single set up.