BORLA®'s CrateMuffler® is the world's first muffler purpose-built to optimize the sound & power of crate and custom built motors. The mufflers are directional. The outlet can be identified by the mounting bracket welded to the endcap.
You pay this much you expect a good rumble. It sounds more tin like def not loud. Can’t tell til it’s on and once it’s on you are SOL. If you are looking for a low rumble with volume flomaster is half the price and sounded way better. Thought this was going to be an upgrade in sound and quality but it wasn’t.