The performance of Harris asphalt modified race cars is influenced by several key process parameters in asphalt or bitumen modification. These include the type and concentration of modifiers used, the mixing temperature, and the duration of mixing. Additionally, the viscosity and elasticity of the modified asphalt play crucial roles in enhancing performance. Proper control of these parameters ensures optimal adhesion, durability, and resistance to deformation, ultimately improving the handling and speed of the race cars on the track.