From what I remember working with Kraftwerks, a stock K24A2 with a C38-61 Rotrex unit (the smallest version of the biggest size) averaged around 410 whp on a dynojet. Most of the guys who are running the K-Race kits are from the East Coast as us West Coast guys are 1) Too snobby to part with our A/C units and/or 2) Can't afford it with all the custom work that needs to be done. Needless to say I can vouch for both.