Summit brand exhaust kits

Hey guys,

i was checking out these exhaust systems from summit for my 71 scamp

http://store.summitracing.com/egnse...0+4294908078+115+4294903037&Ntk=KeywordSearch

I was wondering if anyone has used any of the summit systems on their mopars and what their opinions on them are... I was probably going to go with the 3 inch system, but not sure if I am going to go with the one including summit mufflers or the one with no mufflers....they seem to be priced pretty good...what do you guys think?