Since Marvel developed the perforated nozzle it is their technology and it won't be offered for the Avstar carb. We really don't know if it will fit or not. There will be an exchange program though for those with the Avstar carbs. We made the perforated nozzle standard for the 2014 model year changes, effective s/n 294.
There is another improvement for the carburetor systems we'll be announcing shortly as well, I expect most who would be interested in the nozzle would also be interested in the new widget so we're working up a package. We expect to have a flyer on the whole package and various options soon. We've all been fairly preoccupied with the SA0009 issue but should have that behind us soon.
Randy Lervold
We did the perforated nozzle upgrade on a Carbon Cub earlier this week here in Atlanta and the difference is very noticeable. No coughing or stumbling on climbout WOT and full Rich. I was impressed with the improvement. It appears to work as advertised.