HP gain from MRT catted h-pipe?

[steve0914]

i have full bolt ons, and i saw the biggest hp add with my pypes x.. 13 rwhp

 

[Seraphitia102]

So all those mods you did are for show only...............

yeah pretty much actually. i wasn't expecting to go fast without a blower. anything other than that (except gears and tune) are hard to feel a SOTP experience.