I'd be surprised if they did prepreg for the production parts. Parts in the aftermarket automotive industry are very rarely done in prepreg and they're done in much higher volumes. With a niche product like a backplate, I can't see a company justifying the extra costs.
An aluminum insert in between the layers probably is what they're doing, but it's a horrible idea. Carbon and aluminum in a saltwater environment is a recipe for lots of galvanic corrosion. Titanium is the right material for the job, but again with the extra costs and being a niche product.
An aluminum insert in between the layers probably is what they're doing, but it's a horrible idea. Carbon and aluminum in a saltwater environment is a recipe for lots of galvanic corrosion. Titanium is the right material for the job, but again with the extra costs and being a niche product.