Check the listing for details. HPI Nitro Star F3.5 V2 Engine w/Pullstart [HPI111600]. Condition: New. Listed at 174.99 USD. This is a replacement HPI Nitro Star F3.5 V2 Nitro Engine with Pullstart. The F3.5 V2 features a crankcase and heatsink design with larger heatsink fins for improved cooling. This design makes the engine 22g lighter and 4mm taller. A pullstart 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! The engine is started by a simple pullstarter system and the two-needle carburetor allows you to fine-tune the performance for any kind of weather or fuel. One added benefit of the Nitro Star F3.5 is that it's a race-legal .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! On the inside, the F3.5 has true ABC construction, with a chrome-plated brass piston and cylinder surrounded by the lightweight aluminum case. Features: 2.5 horsepower on tap Race-legal .21 engine size True ABC construction for long life Composite carb construction helps prevent heat vaporization of fuel Finned aluminum case Huge aluminum heatsink Tough pullstarter fitted standard 2-stage air filter for extra engine protection Splash cover over air filter keeps the engine from getting flooded with water in wet conditions 2-needle carb adjustment for fine-tuning About Us | View Store