I am leaning towards the 6" diameter by 18" long bodied Magnaflow beside the tank. Then if required, I would look at the 4" diameter by 14"/18" long bodied Magnaflow as a resonator.
I attached one of the 6" verions for reference. I already measured and the 18" body should work beside the tank, it just depends on the tail pipe and I will buy it first before choosing the length of muffler. I want the longest muffler beside the tank that will fit.
