Arrow slip on mufflers

[the Ferret]

Does a slip on exhaust increase horsepower?
Slip-on systems are the cheaper option and offer great value for the amount you spend. They basically just replace the stock muffler of the bike and are a popular upgrade for sportbikes. ... On an average, the slip-on can increase your horsepower by 5% while reducing the weight of your bike by pounds. Feb 12, 2016

Slip-on vs Full System Motorcycle Exhausts - SoloMotoParts.com

For a CB a 5% gain would be in the neighborhood of 4 1/4 HP

http://cb1100forum.com/forum/showthread.php?tid=5032

Excerpt from thread above:

I seem to recall the highest HP anyone has gotten on this board was in the neighborhood of 92 HP but I couldn't find it. I found it

Fuzzy reported 92.4 Post 26 (13 air box mod, PC, Yosh pipe)

http://cb1100forum.com/forum/showthread....light=dyno

I think HondaHoarder reported right at 80 (stock 2013)

http://cb1100forum.com/forum/showthread....light=dyno

Hikertoo reported 83 post 9 (13 with Staintune, PC and reflash?)

http://cb1100forum.com/forum/showthread....light=dyno

12CB96vfr reported 88 (13 Two-Bros slip on, K&N, and the PCV.)

http://cb1100forum.com/forum/showthread....light=dyno

Motorcycle,com got 81.5 (stock 13)

Two Brothers Racing got 90.5 with their pipe (83 stock)

all different days, different weather, different dynos btw


Since I made this post in 2015 I think 2 members have topped 100 HP but both required extensive work, way more than just a slip on.