Just had a Section 18 installed last week or so , actually has a really nice sound to it – nice low burble on idle then as you wind up slowly begins to howl, 0-2000 revs reasonable quite 2000-3000 loud but not antisocial 3000+ screams like its possessed. Depends how you drive it , love the noise it makes , the exhaust valve is a must though originally had mine bypassed , too loud without.
Should hope not , only been on since Saturday? If you mean the back box section 18 doesn’t have one , only a small middle silencer hence why its so loud. Had a look and cant see any holes in my exhaust anyway. That and i found iPhone sound recording ain’t great.