O'Donnell Racing SS .21

AU$335

Sure to be the engine choice of dominant drivers!

• The crankcase, cylinder sleeve and piston materials are optimized for uniform expansion, which improves durability and reliability
• 4-port ABC cylinder
• Balanced Max-Flo? crankshaft with Class 5 precision bearings
• Machined 7075-T6 aluminum con rod with double bushings
• Unique, compact 4-spring header attachment design
• Includes a high-performance O'Donnell #99 glow plug