So I already have a 2Bros slip-on but I want to squeeze a bit more power out of it now that it's a dedicated trackie. Instead of spending money to get a full system, how close to a full system would getting a muffler shop to delete the cat be?

P.S. I will also be adding the stardard air filter upgrade/PC5 to it as well.

https://www.ninjette.org/forums/showthread.php?t=122220


do it. then run it on a dyno. and post the dyno chart here please.

Even if you were to cut out the front cat and weld a plain tube there, the diameter of the headers is larger on an aftermarket system. At least it is on my Yoshi.

So I already have a 2Bros slip-on but I want to squeeze a bit more power out of it now that it's a dedicated trackie. Instead of spending money to get a full system, how close to a full system would getting a muffler shop to delete the cat be?

P.S. I will also be adding the stardard air filter upgrade/PC5 to it as well.

Hi John - This is a post from July 2013 of essentially that question. Link here to thread -
https://www.ninjette.org/forums/showthread.php?p=718777#post718777

We did actually test this. It simply was not worth posting any info about it. No matter how hard we tried, the only significant difference is sound and a slight reduction in radiant heat. We even tested it with the Slip-On. If you can truly feel that slight difference in low-end, you are a human dyno my friend. ;) Honestly, there is more power increase by simply re-mapping.:thumbup:

http://im1.shutterfly.com/media/47a3d902b3127ccef3fa9429292c00000030O00AbMmLRw5ct2IPbz4S/cC/f%3D0/ls%3D00107998412620130723192024930.JPG/ps%3D50/r%3D0/rx%3D550/ry%3D400/