O.S. Max Speed Tuned .21 VZ-B V-Spec-T (P) Off-Road 1/8 scale racing engine is a first for model engines, magnesium heat sink head weighs 15% less than aluminum and also runs cooler. Hardened, chrome-plated, 4-port, cylinder and liner for high durability and long life. Machined steel piston features parallel rings that trap fuel oils and use them as a seal to enhance compression and boost power. Reshaped crankcase core ensures smoother air flow and more consistent performance. Ceramic rear crankshaft bearings. Tungsten weight on crankshaft for added balance. Slide Valve Carburetor with 7mm, 8mm and 9mm carb restrictors allow tuning to specific track conditions, low-end needle adjusts from side to side for maximum adjustment ease. This product includes one speed tuned .21 VZ-B V-Spec-T (P) racing engine w 21H carburetor with P3 Ultra Hot Turbo plug, OS decal sheet, extra head shim/gasket (The other gasket is pre-installed), one each 7mm, 8mm and 9mm carb restrictors, exhaust port seal ring, two carb rubber gaskets, carb and exhaust covers.

#203 Air Cleaner Assembly
Exhaust System: T-2060SC WN tuned silencer developed specifically for this engine.
Fuel:10-30% nitro content with 18% lubricant content