Ready to tear up the track!
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