I really hate to ask such a simple question, but....

And aside from 'nothing because both series of yours are in a landfill somewhere....'

What's the difference between S4 and S5 rear bumper foam? I have an S5 bumper but forgot to grab the foam and have S4's in local yards that I can pull but I don't want to go through the hassle if they still won't fit.

Thanks for entertaining this...

 

just the shape. although i can't imagine it being TOO different

 

I guess I'll just have to go for it and shave it down / fill 'er in if it doesn't fit 100%.

 

i used my original foam when I put my s5 rear bumper on

 

+1

i doubt there is a difference