I wasn't going to say anything about this exhaust because everyone has their angle and that's fine. But it bothers me when a company says things that just don't add up. I'm not saying this isn't a great product. Just that I don't see how it can be everything at the same time.
'This glasspack muffler does NOT have to be repacked after so many miles, like many other glasspack mufflers.'
Every Glass Pack Muffler ever made has to be re-packed at some interval. Some packing lasts longer than others, but none last forever. What I am hoping they mean here is that their glass pack does not need to be re-packed as often as some.
Secondly, many quality mufflers base their repacking schedule on the muffler being raced. Most will go much further with the kind of riding we do on our Spyder's. So you shouldn't necessarily be put off by a relatively short repack recommendation. My Yoshimura has gone about 20k before needing a repack.
'Does not require any re-mapping of the computer, a juicebox nor a O2 modifier!'
Ok, I can go with this except for the next claim which I do not think fits the mold.
'Keeps your engine running cooler, better mpg, more power.'
For all of this to happen the exhaust has to be less restrictive. This allows the exhaust to exit more quickly and a bigger intake volume to enter the cylinder. But this will also tend to lean out the fuel mixture. Like most vehicles produced today, our Spyder runs very lean to start with. Changing the exhaust to a more free flowing condition will increase this lean condition. Without a reliable method of enriching the fuel mix, you can have issues.
With any intake/exhaust modification you should be prepared to do the job right. If it needs a fuel management system it's best to get a good one. If the exhaust is louder and improves exhaust flow then there is a good chance you'll need some form of fuel modification.
