“The 28 Spec 2s is a .28 cubic inch big block engine. Replacing the original Spec 1S, the Axial .28 Spec 2S features a larger machined billet aluminum heat-sink head for increased surface area and cooling, adjusted timing for increased RPM (37,500 vs. 36,000), and a three needle slide carburetor that includes 8.0. 8.5, & 9.0mm venturis.
Standard features include:
- Dual bushing aluminum connecting rod
- True ABC chrome sleeve construction for durability.
- Easy to tune carburetor
This is a direct bolt-in replacement engine for any .21+ engine mount, and will accept most aftermarket shaft drive starting systems.”