I just picked up a White Bros R4 slip-on a couple weeks ago and was really surprised by the killer sound and the performance, For the money its hard to beat[img]i/expressions/face-icon-small-wink.gif[/img]

 

I had the WB and loved the sound , had a ProCircuit on for a day and noticed a big diff in power , so I put the CT on just because of
the ratings and it was not that much of a diff then the ProCircuit but the CT is the quietest IMO the WB was the loudest I have heard , but
they all still sound like a souped up VW .....lol

 

I have and HMF slip-on system. It sounds great and is a great power increasement. I paid 229.99 for the slip-on and if i full system it would really be more powerful

 

The best sounding pipe I have heard so far on a Z/KFX is a Scorpion. They look awesome too, but don't know about performance.

 

MY YOSH. SOUNDS TOUGH TOOK THE SCREEN ARRESTOR OUT TOO

 

Does the trinity pipe have that forest approval deal stamp? I do a fair amount of trail riding on DNR regulated trails, so that stamp may be important in the future. Is the Yoshi approved?

 

I like the yohsi on the z. it gives it great bottom and ok top end. another thing is you can buy quet kits for it and it takes 5 min to put them in.