The applications for the Signature Series line cover the entire powersports spectrum, including many off-road applications. All Signature Series components are tested, documented, and marked as required by federal and state regulations. CARB/EPA tail-pipe emissions compliant All applications are marked with appropriate EPA noise emissions labels Certified by an independent laboratory for EPA noise compliance The popular R-77 offers outstanding performance, thanks to being developed in the heat of competition. It features a trapezoidal design, which allows a large volume of packing material and in turn delivers top performance with minimal sound increase. The R-77 mufflers front cap is MIG-welded, while the end cap is riveted using high-end 304-L polished stainless steel rivets and bands. Superbike technology and styling Trapezoidal-shaped sleeve Large volume of packing material Straight baffle for ample flow Innovative end-cap Stainless steel tail-pipe