17-20 RC390 R-77 3/4 SS/SS/CF WF
- Not tested for EPA noise levels
- Marked with appropriate EPA noise emissions labels
- Trapezoid shape muffler sleeve to maximize exhaust flow volume
- Meet noise level regulations of most worldwide race sanctioning organizations
- Designed for closed-course competition use only; not for street use
- Can accept low-volume sound insert
- Straight, single-core baffle
16381CJ520