66rmack Posted January 31, 2016 Share Posted January 31, 2016 I want to put duals on my 70 r model. The people I got my truck from f'ed the exhaust all up. I am having a hard time finding pics of the exhaust routing. I don't care about buying the factory pipes I just want some pics of the passenger side factory exhaust. So I can make mine look factory. Preferably the square tank style. I want my driver side to mimic the factory passenger side under the frame. Quote Link to comment https://www.bigmacktrucks.com/topic/43801-early-r-model-exhaust/ Share on other sites More sharing options...
85snowdog Posted January 31, 2016 Share Posted January 31, 2016 I'm not sure if this helps you. From PAI, parts are still available, just got some in the fall. 2 Quote Keith Link to comment https://www.bigmacktrucks.com/topic/43801-early-r-model-exhaust/#findComment-322503 Share on other sites More sharing options...
Popular Post kscarbel2 Posted January 31, 2016 Popular Post Share Posted January 31, 2016 Some early R-models were not equipped with a muffler. Remember, in those days, the turbocharger was accepted as a muffling device, and the Garrett AiResearch turbochargers had a metal tag stating so. 6 Quote Link to comment https://www.bigmacktrucks.com/topic/43801-early-r-model-exhaust/#findComment-322514 Share on other sites More sharing options...
theakerstwo Posted February 1, 2016 Share Posted February 1, 2016 I cant copy and paste but check out grand rock exhaust for heavy trucks Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/43801-early-r-model-exhaust/#findComment-322520 Share on other sites More sharing options...
66rmack Posted February 1, 2016 Author Share Posted February 1, 2016 First off thank you for the info. What I'm actually looking for is pictures of the mounting systems and pictures of the exhaust on the trucks. I'm going to make the system. If anyone has a pic of the dual stacks and the mounting setup. Quote Link to comment https://www.bigmacktrucks.com/topic/43801-early-r-model-exhaust/#findComment-322532 Share on other sites More sharing options...
Hobert62 Posted February 7, 2016 Share Posted February 7, 2016 These are the brackets I made for my B. I made them from 1/4" plate, 2x4 box, and 5" channel. They bolt through the crossmember right behind the cab. They are solid without a cross bar, simple to make, clean in appearance. Just an idea for you. Quote Link to comment https://www.bigmacktrucks.com/topic/43801-early-r-model-exhaust/#findComment-323378 Share on other sites More sharing options...
mrgumby Posted February 7, 2016 Share Posted February 7, 2016 http://www.grpipes.com/heavyduty/Mack.pdf 1 Quote Link to comment https://www.bigmacktrucks.com/topic/43801-early-r-model-exhaust/#findComment-323380 Share on other sites More sharing options...
Underdog Posted February 7, 2016 Share Posted February 7, 2016 Some early R-models were not equipped with a muffler. Remember, in those days, the turbocharger was accepted as a muffling device, and the Garrett AiResearch turbochargers had a metal tag stating so.I used to get in trouble for straight pipes in NJ, because they couldn't bust me for smoke lol ( I had an air switch under the seat to turn the puff limiter on & off) . M y turbo had the MUFFLING DEVICE tag on it, got a noise ticket, went to court and the judge threw it out.Sent from my XT1254 using Tapatalk 2 Quote Link to comment https://www.bigmacktrucks.com/topic/43801-early-r-model-exhaust/#findComment-323397 Share on other sites More sharing options...
66rmack Posted February 11, 2016 Author Share Posted February 11, 2016 Thank you guys for the ideas. I may build brackets like yours hobert62 Quote Link to comment https://www.bigmacktrucks.com/topic/43801-early-r-model-exhaust/#findComment-323768 Share on other sites More sharing options...
Hobert62 Posted February 11, 2016 Share Posted February 11, 2016 I'm going to add a bracket that drops straight down on each side yet. It will clamp to the cross pipe to hold everything up. The 2 peterbuilt clamps will be on the uprights to hold the stacks in place side to side and front and back. Quote Link to comment https://www.bigmacktrucks.com/topic/43801-early-r-model-exhaust/#findComment-323852 Share on other sites More sharing options...
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