Can a simple change in muffler type increase HP. I hear that chnging to one of those lush sounding thrushy types will increase HP. Is this really true and what should I ask for ? I toiw a RV and any HP increase is indeed helpful. Plus I like that sound
RR

 

everyone has their own opinion os how they want theirexhaust to sound so recommending one based on sound is difficult. But a simple muffler swap to free flowing one can provide a slight increase in power with a change in the sound.