R-77 muffler type. Stainless/carbon/carbon slip-on.

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