Item fits 1998 1999 Yamaha WR400 F / YZ400 F & 2000 2001 2002 Yamaha WR426 F / YZ426 F models. Part# 044013  FMF PowerCore 4 aluminum modular muffler with Hi-Flo end cap, and stainless steel mid-pipe. FMF developed the PowerCore4 to increase the horsepower and torque throughout the entire power curve and give you a noticeable power increase that is very usable and beneficial, no matter what your riding style or ability is. Space Age internal packing for maximum packing life. Hi-Flo modular end cap. Internal shape of core uses Hi-Flo technology. Enhanced sonic evacuation provides for higher flow and increased power. FMF pipes are computer designed and Dyno tested to make the power gains where each machine needs the most. FMF's Tru-Flo stamping process ensures a perfect fit and optimum performance. 18 and 19-gauge steel make their pipes stronger than stock. Some of FMF's performance designs are the most copied in the world! FMF pipes help put David Vuillemin in first place time and time again, they can help you as well.

We have a large  inventory our California location and multiple drop-ship warehouses across the US to help provide you the fastest delivery times. Your item is brand new, and will come to you in the factory packaging with all supplied instructions, decals, and any other materials included from the manufacturer. Your tracking number will be emailed*, and you will be provided with a Technical Support phone number should you have any questions after your purchase. If you have other questions regarding the exhaust pipes, air filters, tuning kits, installation or additional products in our ebay store ask the experts at parts@jcmotors.com or call (800) 706-9476. When calling or e-mailing, please have your phone number and auction ID number ready.