I'm sorry, but let's be real here...no one has proven gains from any catback aftermarket exhaust. In my opinion, the RPI claim of 20-30HP is completely unsubstantiated. Dave, do you recall the desert races?
Now that you've pulled your filters, we should run again. Regardless those filters don't justify 20-30 horses.
As far as LOUD is concerned though, the GTM is unparalleled
