From what i can gather,with my bike as pretty much standard,it looks like i am better off making the system in 45's rather than 50's.keeping the 50mm silencers of course.As i am looking at doing the work,the only cost will be the tube,maybe get some flanges plus my labour.How does the nest of vipers differ from the spaghetti system?Do you have any pics please.As many as possible!!