Hello, This is a small idea I just came up with. for people like me who dont have the newest or best PC parts available there should be an option for the part configurator which works the same way as seen in the Tuning menu. Means that you can change parts like now where you reload everytime you change a part. But there could be an option to change every part you want ( lets say front bumpers spoiler rims etc) and then hit a apply button. then the car only needs to reload once instead of everytime you change one part.
One workaround is to open the part menu, and then pause the physics ( "J" key ). Then you can change all the parts you want