Muffler Type: R-77. Materials: Stainless/carbon/carbon (Works Finish). EMIS Category: 3.

• Trapezoid shape muffler sleeve to maximize exhaust flow volume
• Can accept low-volume sound insert
• Not tested for EPA noise levels
• Marked with appropriate EPA noise emissions labels
• Straight, single-core baffle
• Meet noise level regulations of most worldwide race sanctioning organizations
• Designed for closed-course competition use only; not for street use