We haven't received any .21 Firstline motors yet so I can't comment from firsthand experience. They should arrive next week and I'll report on our testing shortly thereafter. However, I can make a few comments:

1. The Firstline Black Mod engines are fast. We have done a lot of testing with the Firstline .12 Black Mod (JP12P3LB) and its a great engine. Chris Lefevre ran one at our last FL State series race and finished 3rd. The only drivers to beat him were Chris Tosolini and DJ Apolaro, both factory/world drivers. He was only 1.5 laps behind after 30 minutes. We also tested at Ft. Myers and he was turning low 13s with it. A Touring car running low 13s at The Fort is flying.

2. The Firstline .21 Black Mod has the same timing as the FX-21 R-03 (a great motor) so it will also be very fast with a linear/smooth powerband. It should be pretty good on fuel, too. With a Street Price under $380, its the best value in 8th scale right now.

I'll post more info after we test one.