sorry about the late reply. The NX3.0 engine will be added onto our site very soon. Below are some specs you might be interested in. We are in the progress of redesigning the entire website, thats why everything take a little longer to process.

NX 3.0 Parts # G70356

Displacement: .18 (3.0cc)
Exhaust : side exhaust
Carb: 2 needle rotary Carb.
Starter Type: Pull start
Crankshaft: threaded
Piston / Sleeve: ABC
Standard Blue-anodized Cooling Head
20% Power increase than .16

The 3 speed project for CT$S has been temporarilyy suspened. We are sorry about the inconvinence this may cause. However, as of today, CT4S is still the fasest RTR out of box in the world. No other Nitro vechile does 73+MPH with stock gearing. We are still relaeasing new hopups for CT4S. The competition drivetrain kit (CT045) for CT4S is now complete.