Not true, the SPT unit is 3 inches. I had to modify my old-style TurboXS midpipe and remove the 2.5" neck-down to match it up with the SPT axleback and make it inches all the way through.Neither one is straight-through, and both are 2.5". I'd get the STi stock axleback because it's cheaper, that's what I'm running.
Id grab the SPT muffler and take it to a muffler shop and have them fabricate a midpipe for it or have it adapted to fit your stock midpipe.I just talked to him and it is only the SPT muffler without the midpipe. The SPT muffler doesnot fit the stock mid pipe and hodges subaru said that the mid pipe is not available for purchase seprate.
I will either get the stock sti from him, if the price is right, or keep looking for something else.
how about a wrx HKS Hi power in 2.5 inches?