FNMUPN8

Stealth version does not add quad round tips, it keeps the stock tip set-up, otherwise it is the same.
Check youtube, there was a video on there from someone who bought the "stealth" system. search stealth ISS exhaust

And there are a variety of versions because the system is somewhat built to order. I know you can get a track or street version, tips or stealth version, polished or blacked out tips...