C4 Corvette to LS Solid Motor Mount Conversion Kit, 1983-96. Machined aluminum provides a secure fit and includes aluminum bushings and steel mounting hardware. Machined aluminum for durability and a sure fit. Aluminum bushings provide solid mount feel for race applications. Speedway Motors is America's Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 71 years.