Yoshimura YO-SA-13-K Spark Arrester Kit for RS-4S Mufflers 1.500"

As others have mentioned on the internet it doesn't fit very well. Also on the original DB killer it replaces there's a threaded washer welded onto the fitting. This has nothing and the screw cannot thread into anything. Had to use a hammer and block to tap it into place it is in so tight it isn't coming out now need for the screw. But if I have to remove it I will have to disassemble the muffler. Can't really notice a noise benefit but there maybe the slightest improvement in noise. Overall a pretty disappointing product considering it's from Yoshie as well. I don't think they have even tried to fit one and or kept up any quality control of outsourcing the part.