Kerker 4-1 Any way to quiet this baby down. Kerker makes a silencer would that replace my existing muffler or is that what I have now. Maybe the baffling needs repacked or my ears are more sensitive with age. 75mph not bad but 40-55 is to noisy. Wife was in bed and she could here me going through the gears 1/2 mile down the road. Must be the early morning fog. Stage 5 jet kit with individual K&N's still get 30 mpg.