A seriously impressive device! It's quiet and polite when you're driving around at low speeds, then roars into life the moment you plant your foot. Due to its active design you get the benefits of a silencer but without the bottleneck and resulting power loss of a conventional silencer when driving a car hard.
Taken from my old Apexi GT exhaust. The exhaust has since been removed and is up for sale, so the Active Silencer is also looking for a new home.
This will fit non-Apexi exhausts, so long as the tip is 4.5" and it's of a similar depth. http://www.apexi-usa.com/store/index.ph ... r-tip.html £100
Little added kudos to your sale potentially...I believe this is the silencer insert as seen in the SARD MC4 GTII brochure. Correct me if i'm wrong/if anyone knows any different.
Good luck with the sale.