You need a patent to cover products such as these. Not even counting the high up-front costs of filing for a patent (~$10K), difficulty of demonstrating innovation (how is a high flow cast exhaust manifold for the Z32 innovative?), and drafting the patent in such a way that there are no loopholes... there is currently a 5-8 year wait time for patent processing. Who knows where this market will be in 5-8 years?