the 'busa engine is used in the Radicals
and in the Westfield Megabusa
and in the winning hillclimb open wheel specials
and is the basis of most of the small capacity, high performance V8s recently made available.
With the Kwaka engine it's a limited landscape of tuners, developers and products.
The new 'busa engine was engineered to enable most of the after market tuners products to fit the market is SO big