FMF Q4 S/A '03-05 YZ450F 03-06 WR450F 44199

FMF Q4 S/A '03-05 YZ450F 03-06 WR450F 44199. The vendor part number is 44199. Read title carefully to know what you are getting. Here is the catalog descrion NOT the title?

• Incorporates internal baffles, chambers and space age sound-absorbing materials to accelerate exhaust flow with less noise and minimal power loss
• Well under the 96db sound output on most machines to satisfy strict sound requirements
• U.S. Forestry approved Spark arrestor with maintenance free, stainless steel spark arrestor screen