PURE makes 550 WHP fully maxed out, you'll be lucky and in danger if you get more than that... Our kit has been proven to make 680+ WHP and with a 1.1:1 backpressure ratio, which means safer and cleaner power!
Some results:
https://www.n54tech.com/forums/showthread.php?t=53290
http://bigboostusa.com/customers-cars-and-builds/