scottwetzel Posted January 23, 2015 Share Posted January 23, 2015 I'm currently running twin 5 inch stacks (mufflers) with 6 inch chrome stacks at the top. Been thinking about switching to 6 or 7 inch straight pipes. My exhaust of course run under the cab with 5 inch piping to 5 inch elbows. The question is do I just get 6 or 7 inch straight pipes and have them reduce to 5 inches at the elbows or scrap everything and run 6 or 7 inch pipe out from under the cab? Im not even sure if that's poss with out clearance issues. What have u guys done in the past and what looks good? Quote Link to comment https://www.bigmacktrucks.com/topic/38558-superliner-stack-question/ Share on other sites More sharing options...
Lmackattack Posted January 23, 2015 Share Posted January 23, 2015 My RS700L has 5" straight stacks with 5" elbows that reduce to 4, under the cab. Clearance is tight between the frame rail and cab. Your superliner will sit 1-2" higher than my truck so you might be able to squeez 6" elbows but it will be tight and you will want to check the air ride cab movement to be sure it will work. Quote Link to comment https://www.bigmacktrucks.com/topic/38558-superliner-stack-question/#findComment-275467 Share on other sites More sharing options...
Superdog Posted January 23, 2015 Share Posted January 23, 2015 use 5 inch under the cab. if you want the look of 6 in elbows,use a short one and have your reducer just after it comes out from under the cab. if you can live with 5 in. elbows,mount the reducers at the top of elbow or just get stacks that are already reduced from 6 to 5 in. Quote Link to comment https://www.bigmacktrucks.com/topic/38558-superliner-stack-question/#findComment-275480 Share on other sites More sharing options...
Back In Black Pulling Posted January 23, 2015 Share Posted January 23, 2015 My truck has 7 reduced to 5 , no air ride , some pics to give you idea what it would look like Quote Link to comment https://www.bigmacktrucks.com/topic/38558-superliner-stack-question/#findComment-275573 Share on other sites More sharing options...
jackb61sx Posted January 24, 2015 Share Posted January 24, 2015 This picture is of my truck when I first bought it with 6" straight pipes. They went from the 5" 90 and flared out to the 6" pipe. I'm older and valued my hearing so I removed them, they looked good but not for me,,,,,,, Quote Link to comment https://www.bigmacktrucks.com/topic/38558-superliner-stack-question/#findComment-275579 Share on other sites More sharing options...
Stewartlil Posted November 9, 2021 Share Posted November 9, 2021 On 1/23/2015 at 5:26 PM, Back In Black Pulling said: My truck has 7 reduced to 5 , no air ride , some pics to give you idea what it would look like Is there anyway you could supply a vin number so I could possibly get the same stack bracket for the drivers side as you have? Quote Link to comment https://www.bigmacktrucks.com/topic/38558-superliner-stack-question/#findComment-482644 Share on other sites More sharing options...
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