First The Donald...I mean the98mustang wants a Mustang that makes over 550 RWHP on a P-1SC, then jalapeño pepper wants to see one that makes 600 RWHP. What's next, you want to see a Honda Civic that makes 1000 RWHP on a C-1? BTW, if you actually read my posts I never claimed anything about a specific power level on a 2V 4.6. Horsepower is horsepower, and a 383" LT4 motor blown by a P-1SC will consume much more air than any similarly modded 281" 2V motor and that's the point that eluded a few here. HP is about the mass of fuel/air that enter the motor, not pressure potential (PSI). The The P-1SC is one of Pro Charger's "beginner" super chargers and it still has a ton of potential when in the hands of a competent builder and tuner. Voretch's are popular in the Mustang community because that's what they are familiar and comfortable with, just like Kenne Bell. Mustang enthusiasts have proven to show a trend of sticking to what they are familiar with and not being willing to try out new and possibly even better products. I have met so many ex-Vortech converted to Pro Charger guys at the track it's made for some good stories over the years. But then that's the beautiful thing about us gearheads and the car world isn't it?....to each his own flavor.