Have your cake and eat it too. The FMF KTM Titanium Q4 Silencer matched up with their Stainless Steel Powerbomb Headers is the way to go if your planning to rip it up in your back yard, local school or that golf course you've been looking at when you moved in. Just kidding please don't take that seriously. The Q4 has been the industry standard for all year long ride-ability with it's Quiet Core Insert and famous Spark Arrestor. If you haven't tried FMF you better start before your local laws restrict you with that open MX system you have now.