The Fast and The Furious spent a total of (I'm trying to recall this strictly from memory) $315,000 on the cars and then spent another $200,000 "tuning" them. Now $200,000 is an assload of money but when we're talking about 20 or so cars, thats an average of about $1,000 per vehicle. And they spent a whole lot of money on the supra (which actually did 10.6 quarter miles(that is of course with "NOS" or as I call it NAWZ), which is why Vin Diesel raced him in the Charger and not his p.o.s. RX-7.) For the entire tuning of the Supra they spent $42,000 not including Labor, and for the Charger they spent nearly $60,000 to make that heavy-ass shit run a 10 second quarter. And also notice that tuning includes that Vinyl shit and bodykits that they figured would add the extra 100 hp they needed.
Anyways, all in all, Fast and Furious did nothing to the cars but add bodykits and graphics and maybe a short ram for every one of the cars on that god-forsaken flick. Every car that had a turbo( besides the Supra) used a stock turbo system. If you remember the first race, the RX-7 (used a stock turbo version), and the Eclipse(GS-T for turbo, no upgrade) were the only ones who even had turbo, the other's simply used a cold-air intake and had a front mount OIL COOLER added to make it look like they had a turbo sys on them. They say Movie-Magic I say movie Bull-Shit