I'm selling my 4-1 Jasma/Mugen header off my GSR. It's dented at the bottom, I bought and used them that way. There are two holes that are welded up, must've been for 02 bungs, I purchased the header that way, but they don't leak. Has 2" collector. Asking $175 obo, don't be afraid to lowball. Call/txt 920-883-1594. Best reached during the morning, I work second shift.