I have a set of exhaust pipes which came on my Rapide which was purchased some 50-ish years ago (pictured). they are straight through 1-1/2 inch diameter. Each pipe comes in two sections. No muffler(s). My then 3 year old daughter is now 52 years old! This website won't take other pictures of the pipes today, but I can email them (contact <firstname.lastname@example.org>). Would these be useful for a C-twin modified to race?