Well, I have heard good things about the BD twins. But I bought a 2000 truck with them and I hated them. That truck was an automatic. Dynoed at 650hp. I was very disappointed in the BD setup. it was very hard to keep under 1300 degrees. And only 55psi. The set I built on my 2001 (HX-35/HT3B) Spooled better, ran way cooler and would peg my 60psi boost guage. It dynoed 608 hp at 42psi(couldn't get it to boost on the dyno). MAybe something was wrong with the set I had from BD. I Have heard the B1/B2 setup is awesome, but I definately can't afford those turbos.