I installed a YS140L on my 1/4 Cap 232 and got the cowl to fit nicely after creating clearance for the YS valve cover. However, there is interference with the twin exhaust pipes on the Slimline Pitts style muffler as they contact the bottom of the cowl within an inch of the cowl being in final position. I can cut two oblong slots in the bottom of the cowl to allow the exhaust to slide through, but I was hoping to create just two small holes big enough for the exhaust tubes to protrude through. Any ideas?

Joe