I had one on my 86 VF500F2 in the UK for about 5 years before I sold the bike, I fitted it. It is a complete system, includes downs pipes & a weird round tube collector, which means the rear headers are shorter than the front. It made 59trwhp with that system when it had about 55K miles on the bike. I had a K&N filter & the snorkel out when I took it to the dyno, they said it was a little lean until they put the snorkel back in & it made more power with the snorkel in & sorted the fuelling. It's a reasonable quality system & not to loud. Some pics of mine here in the late 90's Hope that helps.
