FMF Megabomb header 4-stroke 500 (EXC) 24-25Manifold routing optimally adapted to the production engine Resonator chamber for optimum torque distribution and noise reduction Tangible performance boost over the entire engine speed range Highest quality workmanship Approvals: ABE, CCCUO_EU Material: Stainless steel not available in: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,