Sold my Nitro 2015 Z8 to my Brother. Bought a 2017 Nitro Z21 with a 300hp Racing engine with a big end of year discount (-$6000). Got 5 hours break-in on the motor. As advertised it will hit 75 mph. Difference between the Z8 and Z21 is that the Z8 was like a race car and the Z21 is a smooth running, fast and non-chine walking boat.