[Kurt in NJ]

I thought that a muffler for a Mustang 302 single system would be good enough for one side of a flathead merc engine(255 cu in), it was too restrictive and caused overheating on that bank
I put a Mercedes diesel muffler ( it’s straight through) on my Chevy truck with twice the cu in. and it was quiet inside the truck, with proper performance and a healthy sound outside