The B5 has a ton of top end? Maybe its something in your setup,pipe choice, or gearing. Again, the B5 is as fast as anything out there and faster than most. Awesome job to Kortz!! Abviously the engine has got what it takes. It keeps getting awesome results with Kortz. And like werks said ,its a stock one just like the ones anyone can buy. Unlike a lot engine companies where team drivers have modded engines or special (team)things done to them. markhat what vehicle and setup are you running it in?(pipe,clutchbell etc...)