I've being busy working on a v4 slip on exhaust for the past 7 months and finally have a system ready for production. Construction is 304 stainless with 5 axis cnc machined side exit 3 piece tailpipe's that weigh 225g each..very light. Full slip on weighs in at 4.6kg. Massive ground clearance due to a lot of thought put into tailpipe design..Bike in for rexxer tuning this week. will update with results over next few weeks. I am offering a free slip on system to a US forum member who hasn't yet bought or fit an aftermarket unit..p.m me...cheers Gez.