None of the turob kits sold for the DeLorean had blow-off valves, VERY FEW had intercoolers and most had some sort of a wastegate. Almost all of the turbo kits are of the low pressure variety, running at 5.5 lbs to 7.5 lbs. of boost with most in the 6 lb. range. At this level you'll rebuild your turbos many times before you'll hurt the engine - it is very solid. I know of several turbo'd DeLoreans that have been driven 50 to 100,000 miles without noticeable, turbo induced wear. I had 50,000 miles on the turbo's on my first D. There were no engine problems. Most people have no intention to race the D's, they simply want to acquire more power to make the car perform like it looks. My 2¢. Dick Ryan VIN 16867 (Twin turbos) ------------------------------------------------------------------------ To address comments privately to the moderating team, please address moderator@xxxx