A new pull start utilizes a one-way bearing encased in a large 14mm hex for increased durability.The F3.5 engine will give you eye-opening acceleration and crazy top speeds! One added benefit of the Nitro Star F3.5 is that it's a race-legal . HPI NITRO STAR F3.5 Pro Rear Exhaust Without Pullstart - HPI - Silniki... This new design makes the engine 22G lighter and 4mm taller. 21-Size engine, which means you can drop down to your local track or Club and enter in a race as soon as you open the box! Red RC » HPI Nitro Star F3.5 Pro buggy engine Ak Racing Nitro HPI Nitro Star F3.5 V2 Engine, 3.5cc, Slide Carburettor, And Nitro Rc Car On the inside, The F3.5 has true ABC construction, with a chrome-plated brass Piston and cylinder surrounded by the lightweight aluminum case. 2.5 Horsepower on tap Race-legal .21 engine size 6PC Black Spin Mop and Bucket Set with Self Separation Dirty and Clean Water System, Self Wringing 360° Rotating Square Mop-Head for Hardwood Tile Marble Floors The engine is started by a simple pull starter system and the two-needle carburetor allows you to fine-tune the performance for any kind of weather or fuel.