Tried working with someone on a used system but he didn’t like the question I was asking and wouldn’t talk to me on the phone. He also didn’t want to Except PayPal goods and services, only as a gift. But to make a long story short, I’m looking for suggestions on which way to go on a exhaust system in tuner. I’m looking for the performance but I want to still be able to use my quad for Hunting. The HMF with optimizer runs about $518 New, I wasn’t sure if there ever were any other brands that people have testing and liked? Thanks again for your time.Thanks again for your time.