It only gets better. I am glad to hear its responding. The results speak for themselves dont they. I now have 4000miles on mine and I am happy to say that they are hard (fun) miles. The L99 engines are made to run hard up to 6000rpm and I have had no trouble shifting mine at 6400rpm and even bouncing off the limiter at 6500rpm many times. This car is the most fun I have had in a decade!
Have fun, be safe and keep it strait!

Hi Darin, I am a big fan BRO! I did your break in method, lots of fun, and now I can spin my wheels when shifting into 2nd and 3rd. SWEET.