HMF Racing Yamaha Grizzly 660- Titan-XL-Series Slip On 02-08The Yamaha Grizzly 600 is available as a Slip On exhaust in the Performance exhaust. The slip on system picks up 10 15% more horse power and torque throughout the power curve, and weighs substantially less that the stock exhaust. The Performance exhaust will increase sound levels approximately 4 6 decibels above the stock muffler, but the HMF Quiet Core insert can lower that 2 4dB. Fits: (98 01) Grizzly 600, YFM600FN FUEL TUNING IS REQUIREDLEARN MORE