Originally Posted by Chris Peralta

I would leave that extra shim till it finishes breaking in. Then try pulling the shim out and run like half a tank and then pull the cooling head off and check to ensure there is no detonation or small pit's on the piston or button. I have seen a lot of people in here post that they run stock shims with 30% at sea level, but I have never been at sea level to try it myself.

The 2045 is a good pipe for the engine to help it get the best possible run time. If you really want to see it scream try an 086 pipe on it.

Originally Posted by Sarky

30% at sea level doesn't normally request an extra shim. For break in it's ok, but for maximum performance, it would be better to pull it out

Enjoy your new ride!