Item fits 2007 2008 2009 Yamaha YZ450 F WR450 F models.  Part# 044227 Well with Sound Restricting Mufflers. Effectively Reduces Sound Output by as much as 1.5dB. Less Susceptible to Damage than a Long Header. Produces Low End of a Long Header and Top End of a Short Header. Improved Bottom to Mid-Range Power. Exclusive Ti-Metal Construction. Resulting from the highly innovative and successful PowerBomb, FMF Racing has upped the performance and again with the ALL NEW and exclusive titanium MegaBomb.  Utilizing the experience from FMF’s patented module precisely located at the initial stage of the header for improved performance and increased flow, the MegaBomb takes the same principles to a higher level.  The concept evolves from the expansion and contraction of exhaust sonics through the header. The ducted core within the "Bomb" allows the exhaust gases to exit into the enlarged chamber where they expand, cool and ramp back up at a higher velocity resulting in increased flow. In addition to the performance gains, the MegaBomb acts as a pre-muffler reducing overall sound output by as much as 1.5dB on most models! But wait, there’s more - as an added benefit, the MegaBomb restores most of the torque loss experienced when running a more restricted, quieter muffler. The MegaBomb was designed for improving the bottom to mid-range power for the current line of performance four strokes.  What the MegaBomb achieves is the low-end pull of a long header with the top-end surge of a short header though the layout makes it less susceptible to damage than a long header.  Constructed of exclusive Ti-Metal and mandrel bent, the MegaBomb improves power deliver and reduces noise – a win-win by anyone’s standards.  Bolt on the MegaBomb and FEEL THE 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.