The 7mm restrictor on the FMS is just perfect. And whomever thinks the FMS lacks bottom end must be spinning the tires pretty often. I find if you don't pull the throttle open all the way it hooks up better than if you just blast away.

I like the extra power so I can drive without trying to go full speed everywhere. The FMS just rips and make my race day that much better....

Best engine I've run to date....Still love my P5's though......

It's also super easy to tune.....During the hot days in Texas it runs best around 240-250 degrees. Fine with me......