I've been pricing aftermarket exhausts for my '08 FJR1300. There's a Muzzys 4-2-1 full exhaust out there. It's 20 pounds less, increases HP by 7 and torque by 3 ft/lbs (with no other modifications), and it costs about $740 for aluminum (p/n 1016-00084) and $830 for stainless (p/n 1016-00085).
The price isn't much more than some slip on mufflers. One reason why is this uses a single muffler rather than 2.
I'm looking more for reduced weight and more power than for sound. I don't want an exhaust that's too loud. The factory exhaust sounds good and isn't too loud. I'm thinking that by using a single muffler rather than 2, it probably wouldn't be as loud as 2 aftermarket mufflers. Plus I think there are optional tips for less sound.
What do you guys think? Does anyone out there have any experience with this exhaust?