Nitro Star S25 Engine w/Pull Start
Key Features
Billet aluminum heat sink head
Dual bushing connecting rod
True ABC chrome sleeve construction

Overview
More power and a pull-starter to boot. HPI RacingÆs new Nitro Star S-25 has 20% more displacement than the Nitro Star 21BB. ItÆs a .25 cubic inch big-block with a machined billet aluminum heatsink head for extra cooling, dual bushing aluminum connecting rod, true ABC chrome construction and a simplified dual-needle 7mm slide carburetor for easy tuning with a composite body for better performance at higher temperatures. The Nitro Star S-25 provides 2.5 horsepower at 29,000 rpm and comes in an attractive black case.