I assume you mean 4ga in and 8ga out? Do you need fused or non fused? I have both. I could do the fused for $10 shipped and the non fused for $9 shipped. Both are new in the package.
I have two Tiff non fused that are (1) 4ga in and (4) 8ga out. I also have two Knu fused that are (1) 0ga or 4ga in and (2) 4ga or 8ga out. Let me know if you would like all four and I will make you a great deal.