We so do guarantee fitment so if you're having any problems, just hit us via e-mail and we'll send you a return label as well as a new set of pipes.
A lot of these problems can be resolved by having a professional installer who knows the tricks, but there have been a few bad sets out there. We have 422 sets sold to date so a few bad sets is to be expected. However we are sending theses bad pipes back to the manufacturer so we can figure out exactly what went wrong with the process in order to find a way to eliminate it from happening again. We have a few things in mind that will be implemented into the next batch to ensure that we don't have to deal with the occasional misfit.
Again, we guarantee these for the life of your vehicle and we guarantee fitment so if there's ever a problem, just shoot us a message and we'll make sure to help you out