Popular Post j hancock Posted January 4, 2019 Popular Post Share Posted January 4, 2019 Nice clean tractor! 4 Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/55192-1977-mack-r-600/ Share on other sites More sharing options...
terry Posted January 4, 2019 Share Posted January 4, 2019 👍👍👍 Quote Link to comment https://www.bigmacktrucks.com/topic/55192-1977-mack-r-600/#findComment-412453 Share on other sites More sharing options...
Jeff M Posted January 4, 2019 Share Posted January 4, 2019 With a straight pipe, no less. Nothing sounds better than a 300 Maxidyne with a straight pipe--not loud, either. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/55192-1977-mack-r-600/#findComment-412458 Share on other sites More sharing options...
Maxidyne Posted January 4, 2019 Share Posted January 4, 2019 'Cept a V8 Maxidyne with straight pipes! Quote Link to comment https://www.bigmacktrucks.com/topic/55192-1977-mack-r-600/#findComment-412467 Share on other sites More sharing options...
Popular Post Freightrain Posted January 4, 2019 Popular Post Share Posted January 4, 2019 5 hours ago, Jeff M said: With a straight pipe, no less. Nothing sounds better than a 300 Maxidyne with a straight pipe--not loud, either. At least it isn't an 8" pipe!! I like the stock look. My 237 sounds good, and it isn't stupid loud with stock 4" pipes. 3 Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment https://www.bigmacktrucks.com/topic/55192-1977-mack-r-600/#findComment-412473 Share on other sites More sharing options...
Quickfarms Posted January 5, 2019 Share Posted January 5, 2019 How loud would a 350 be with a straight 4" pipe? Quote Link to comment https://www.bigmacktrucks.com/topic/55192-1977-mack-r-600/#findComment-412516 Share on other sites More sharing options...
mrsmackpaul Posted January 5, 2019 Share Posted January 5, 2019 Dunno, but a 320 coolpower isnt to bad at all If the passenger window is up it's nice and quiet out side If I have something big and tall behind the cab it sounds fantastic climbing a hill Hmmm , wonder what it would sound like in a tunnel ??? Paul 1 Quote Link to comment https://www.bigmacktrucks.com/topic/55192-1977-mack-r-600/#findComment-412518 Share on other sites More sharing options...
h67st Posted January 5, 2019 Share Posted January 5, 2019 When I was about 12 y.o. I rode in one of my dad's F600 day cabs with a 673 NA, passenger window down. I don't know if it had a muffler but that sound was one of the things that caused my lifelong addiction to trucks (especially Macks). Quote Link to comment https://www.bigmacktrucks.com/topic/55192-1977-mack-r-600/#findComment-412528 Share on other sites More sharing options...
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