So I was trying to decide a slip on for my wolverine the hmf performance series vs the fmf powercore 4. Do I have to repack either exhaust? If it blows the packing out will it mess up the performance or just be louder? Those are the only 2 pipes I can find for my wolvy. Thanks

 

My vote is for the HMF. Both will need repacking after so many hours of use, usually the packing will last for many years under normal conditions.

 

Thanks raptor I will be riding on trails only. No mud/water at all