Descrizione 1/8 scale GT Touring class racing is becoming increasingly popular, and O.S. has developed the perfect power plant for dominating the competition. The 21XZ-GT boasts many of the advances that Speed engines are famous for, with special modifications that make it ideal for on-road applications. For the max performance GT Touring drivers demand, the Speed 21XZ-GT is the obvious choice. Long stroke engine provides more torque Five scavenger ports and three exhaust ports improve power in the mid- to high range The crankshaft has been engineered for GT touring, and is silicon-potted and DLC coated with tungsten weights pressed in The outer head features a lower CG and shiny fins The dual adjustable carb is ROAR-legal, and comes with a 7 mm restrictor Stock Number: OSMG2062 Displacement: 0.213 cu in (3.49 cc) Bore: 0.641 in (16.27 mm) Stroke: 0.661 in (16.80 mm) Practical rpm: 4,000-42,000 Power Output: 2.61 hp/2.65 ps @ 34,000 rpm Weight: 12.45 oz (353 g) Includes: Turbo P-3 plug